Adopt

Boxer puppies and dogs in Lockport, Illinois

Looking for a Boxer puppy or dog in Lockport, Illinois? Adopt a Pet can help you find an adorable Boxer near you.

Picture of Boxer

Adopt a Boxer near you in Lockport, Illinois

We don't see any Boxers available for adoption right now, but new adoptable pets are added every day. Try a different search below!

Or, how about these Boxers in cities near Lockport, Illinois

These Boxers are available for adoption close to Lockport, Illinois.
We'll also keep you updated on Dancer's adoption status with email updates.
Photo of Dancer

Dancer

Boxer

Male, 2 yrs 9 mos
Lemont, IL
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Age/Birthdate: 01/24/2023 Location: Brookfield, IL * Fully Vetted: Yes Any Special Medical or Special Needs: NO, just finished heartworm treatment & is clear! 100% Healthy boy! Temperament with: Dogs: Good Cats: Unsure Children list specific ages: 10 and up. Strangers: Good Training Needs: Crate Trained: Yes Potty Trained: Yes 🐾 Hi, I’m Dancer! 🐾 I’m a handsome Boxer mix with one adorable ear that stands up—pretty cool, right? I’ve got a gentle, loving personality and get along great with other dogs and cats. I’m crate trained, potty trained, walk well on a leash, and I know some basic commands too! I’m also super treat-motivated—just don’t be surprised if I get a little protective of my food. It’s just too good! I love to play with toys outside and then come inside to snuggle up with my people. I’ve never met a stranger—I’m happy to greet everyone with a wag and a soft smile. Whether you're looking for a cuddle buddy, a playmate, or a loyal companion, I’m your guy. I’d fit right into just about any home. I'm easygoing, loving, and ready to start my new life with a family of my own. Could that be you? This dog is currently located in Chicago's southwest suburbs and can be seen by appointment once an adoption application is completed and approved by the rescue. Please note that we cannot hold dogs for any reason. If the dog or puppy is not yet fully vetted, we can only consider applications from adopters within an hour's drive or 40 miles of Lemont, IL, due to required vet visits at our partner veterinarians. For fully vetted dogs or puppies, we welcome applications from out-of-state or beyond the 40-mile radius. Please only apply if you are ready to meet and welcome a new companion into your home within five days of approval. Breed and Age Information: Unless the puppy was born in our care, we cannot guarantee the breed or age. Breed and age estimates are based on veterinary advice, shelter records, physical appearance, and information provided by previous owners. Adoption Fee: $350 The adoption fee includes: Spay/neuter (performed at one of our partner veterinarians as scheduled by the rescue) Microchip Rabies vaccine DHPP vaccine Bordetella vaccine 4DX test (Heartworm, Anaplasmosis, Ehrlichia, Lyme Disease) General wellness care, including deworming, heartworm prevention, and flea/tick prevention Your adoption fee also helps support medical care for other rescue animals, including heartworm treatments, surgeries, and emergency care. Spay/Neuter Policy: We spay/neuter dogs at 16 weeks or older, at the discretion of the rescue and in consultation with our partner veterinarians. While some veterinarians recommend delaying the procedure based on a breed™s projected size, as a rescue, our primary goal is to prevent unwanted litters. Spaying and neutering also provide significant health benefits, including cancer prevention and reducing behavioral issues. The American Animal Hospital Association and the American Veterinary Medical Association support pediatric spay/neuter for cats and dogs as early as 16 weeks. We carefully assess each case to determine the best timing for the procedure. Interested in Adopting? Submit an adoption application at www.rubywhiskers.org/adopt
We'll also keep you updated on Bruno (Adoption Fee Sponsored)'s adoption status with email updates.
Photo of Bruno (Adoption Fee Sponsored)

Bruno (Adoption Fee Sponsored)

Boxer Labrador Retriever

Male, 1 yr 7 mos
Lemont, IL
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs, Good with cats, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet Bruno! Age/Birthdate: 04/12/2024 * Current Weight: 43lbs * Fully Vetted: Yes * Adoption Fee: Was sponsored by a generous person Any Special Medical or Special Needs: Yes, Bruno will need pregabalin for life due to pain management from being hit by a car. He has some scar tissue that wrap the nerves near his sacrum that may cause pain when he's very active. He takes 1 pill a day and the med cost with Walmart is about 20$ every few months Temperament with: Dogs: Great! Cats: He has met cats and has done well. Children list specific ages: He LOVES everyone but would be best in a home with kiddos 10 and up as has some typical puppy behaviors Strangers: Amazing! He has never met a stranger in his life! Training Needs: Crate Trained: Yes Potty Trained: Yes Bruno is a MIRACLE Boxer/Lab born around 04/12/2024 weighing in at 43 pounds! Bruno isn’t just a dog — he’s a miracle on four legs. This sweet, goofy boy came into rescue after being hit by a car, leaving him with multiple pelvic and leg fractures. He was in excruciating pain to the point where he was unable to walk and spent a lot of time crying. While many specialists gave up hope, Ruby Whiskers Rescue saw the spark in him and refused to quit. After weeks of rest, recovery, and an FHO surgery, Bruno defied the odds. Today, he’s walking, running, and living life to the fullest — you’d never guess what he’s been through by looking at his wagging tail and happy grin! At just over a year old, Bruno is a medium-sized, high-energy dog who’s FULL of love and playfulness! He absolutely ADORES playing with other dogs and would thrive in a home with another high energy companion that can help him burn his puppy energy! Additionally, Bruno would love a home with a fenced-in yard, as he LOVES to run and stretch his legs now that he can use them again- he has a lot of time to make up for! Bruno is a TOTAL goofball who enjoys toys, chew bones, and a good game of indoor fetch! He’s a bit of a chewer — remotes, beware! — so he does best when crated if you’re not home! He is fully potty trained, does well in his crate, and sleeps comfortably through the night in his roomy setup! This sweet boy LOVES people but still has some puppy habits — he’ll jump up to say hello and is a bit mouthy when playing. His foster has been working on this, and he’s improving every day with consistency and structure! Bruno responds well to a calm but firm “no” and benefits from positive reinforcement! While he doesn’t know many formal commands, Bruno is extremely smart and would do wonderfully with a basic obedience class to channel his energy and focus! On walks, Bruno can pull and does best with a harness and he’s not reactive to people or other dogs he passes! He rides calmly in the car when crated, does well for baths and blow-drying (he even tries to chew the air from the dryer like a goof!), and has no toy, water, or food aggression towards people or other dogs! He free-feeds throughout the day and occasionally tries to sneak treats from his foster sister because this boy loves a good treat! Bruno’s ideal home would be with an active family who can give him exercise, structure, and love! A home with another playful dog and older children would be perfect, as his enthusiasm might be too much for toddlers. He’s vocal when he wants to go outside, play, or come back in, but it’s never excessive! Due to his past injuries, Bruno takes pregabalin twice daily for mild chronic pain — an inexpensive medication that keeps him comfortable and active! After everything he’s overcome, Bruno deserves a family who will see him not as “the injured dog,” but as the vibrant, loving, goofy boy he is! He’s resilient, affectionate, and full of joy — a true survivor with a heart of gold! If you’re looking for a loyal companion who will fill your days with laughter, love, and a touch of mischief, Bruno is your guy! If you're interested in meeting Bruno the miracle baby, please fill out the application below! https://www.rubywhiskers.org/adopt This dog is currently located in Chicago's southwest suburbs and can be seen by appointment once an adoption application is completed and approved by the rescue. Please note that we cannot hold dogs for any reason. Please only apply if you are ready to meet and welcome a new companion into your home within five days of approval. Breed and Age Information: Unless the puppy was born in our care, we cannot guarantee the breed or age. Breed and age estimates are based on veterinary advice, shelter records, physical appearance, and information provided by previous owners. The adoption fee includes: Spay/neuter (performed at one of our partner veterinarians as scheduled by the rescue) Microchip Rabies vaccine DHPP vaccine Bordetella vaccine 4DX test (Heartworm, Anaplasmosis, Ehrlichia, Lyme Disease) General wellness care, including deworming, heartworm prevention, and flea/tick prevention Your adoption fee also helps support medical care for other rescue animals, including heartworm treatments, surgeries, and emergency care.
We'll also keep you updated on Bodie's adoption status with email updates.
Photo of Bodie

Bodie

Boxer Pit Bull Terrier

Male, Young
Plainfield, IL
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Not good with kids, Good with dogs, Not good with cats, House-trained, Shots are up-to-date,
Story
Bodie (also known as Brownie) is a 1-year-old Boxer/Pittie mix with a zest for life and a heart full of love! Weighing around 40 pounds, this energetic pup is always ready for action and still has plenty of playful puppy energy to burn. He absolutely loves running around in the yard, playing with his toys, and making new canine friends. Bodie thrives in the company of other dogs and has become quite the social butterfly at Hounds Town, never failing to get the whole room moving with his infectious enthusiasm. Because of his high-energy nature, Bodie would do best in a home with kids 10 and older who can keep up with his playful spirit. A home without cats is preferred. If you're looking for a fun-loving, active companion who will bring excitement and joy into your life, Bodie is the perfect pup for you! Apply today to meet this lovable goofball!   If you are interested in adopting/meeting this pup , please complete our online adoption application that you can find here: https://www.starfishanimalrescue.com/adopt/dog-adoption-application  . Your application will be reviewed by our team and if it is a good fit, we will send to the foster family to set up a meet! The adoption fee of $150 will include spay/neuter, microchip, age appropriate/required vaccinations, treatment for heartworm and any other necessary medical treatment to assure a healthy new pup for your family. IMPORTANT DISCLAIMER: Although we do our best to describe breed, since our pups all come from shelters we can not and will not make any guarantee on breed or size. We can tell you that they are 100% RESCUED! And that is the BEST breed! *please note that we are a foster home based rescue and we do home visits as part of the adoption process - we are unable to adopt to families who live outside of the Chicago and surrounding suburbs. Thank you for your understanding.Visit this organization's web site to see any additional information available about this pet.September 22, 2025, 1:11 pm
We'll also keep you updated on Roxie's adoption status with email updates.
Photo of Roxie

Roxie

Boxer

Female, 2 yrs
Naperville, IL
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs, Spayed or Neutered, Shots are up-to-date,
Story
***********AVAILABLE NOW*********** If you want to add a little unconditional love to your life...I am right here!! I’m an active, fun loving and sweet 49b Boxer little girl. I am in search of my forever family and home that will love me and make endless memories with me. I am the missing piece to completing your wonderful family. Investing your love into me will be so worth it!! I am good with children and other animals. I was rescued from an overcrowded rural shelter with my babies when my family decided that we were too much responsibility. Please add a lotta unconditional love, sloppy kisses, tail wags and endless happiness to your family and contact jbrescuerangers@yahoo.com for an adoption application and bring me home. I will come with the works (Spayed, up to date on everything, micro chipped, fecal, heart worm tested if age appropriate, heartworm, flea and tick prevented, a free vet visit and medical insurance). What more could a new family ask for? Love and Kisses, Roxie
We'll also keep you updated on Hazelnut's adoption status with email updates.
Photo of Hazelnut

Hazelnut

Boxer American Pit Bull Terrier

Female, 7 mos
Manhattan, IL
Size
(when grown) -
Details
Spayed or Neutered,
Story
-
We'll also keep you updated on Roman's adoption status with email updates.
Photo of Roman

Roman

Boxer

Male, 3 yrs
Naperville, IL
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with dogs, House-trained, Shots are up-to-date,
Story
Roman: The Big Lug Looking for a Soft Place to Land - Available For Foster or Adoption in Georgia. Will travel for the right home! Hi. I am Roman. I am a 65 pound Boxer mix with the kind of face that makes people smile even before I do anything. I am a big soft lug who wants a porch, a sofa, and a human who likes slow pats on the head. My energy is just right. I can hang out, go for a walk, sniff around the yard, then come inside and settle next to you. I walk well on a leash. I do not make things hard. I like being easy. I dont want any ruckus. I get along with male and female dogs. I am a gentleman until someone tries to boss me around. I do not start trouble, but I also do not let pushy dogs run the show. I usually get along best with female dogs. Having said that, I have a rescue buddy (male) here and we do great together. We move at the same pace. We enjoy the same simple things. So I guess, like you humans, it's if our personalities get along! People say I am the kind of dog who makes life feel calmer. I am not loud. I am not clingy. I am just present. Sit with me for two minutes and you will get it. I am the dog who leans into your leg and lets out a long breath. I make the world feel lighter. If you want a sweet older boy who loves porch time, couch time, and just being near you, I am your guy. I am ready for my home. Apply to foster or adopt me and let’s make some quiet, good memories together.   ##2537421##

These pups are in Lockport, Illinois too!

Below are our newest added Boxers available for adoption in Lockport, Illinois. To see more adoptable Boxers in Lockport, Illinois, use the search tool below to enter specific criteria!
We'll also keep you updated on Tink's adoption status with email updates.
Photo of Tink

Tink

American Pit Bull Terrier

Female, Adult
Romeoville, IL
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs, House-trained, Spayed or Neutered,
Story
Meet Tink – Your Energetic and Loyal Companion Tink is a lively, affectionate dog best described as a natural protector with unmatched energy. She loves to run, play games like monkey in the middle, and enjoys regular trips to the dog park. Plush toys and soft blankets are her absolute favorites. Tink would thrive in an active household. Her ideal adopter should have a backyard or be committed to incorporating regular exercise into her daily routine. She interacts well with children and other dogs, making her a wonderful fit for families. She is house-trained, crate-trained, and knows basic commands. Tink has been spayed and microchipped, though she is not currently up to date on vaccinations. She has no medical conditions or dietary restrictions. Tink is free to a loving, responsible home that can provide her with the activity, care, and affection she deserves.
We'll also keep you updated on Luna's adoption status with email updates.
Photo of Luna

Luna

Pit Bull Terrier

Female, 3 yrs 2 mos
Romeoville, IL
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs, Good with cats, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet our pretty girl Princess Luna❤️ this girl is so special and had a horrible beginning to her life and spent much time on her own and not wanted. Luna joined our rescue about 1.5 weeks ago, she is Pit Terrier Mix about 3 years old. She has the most soulful eyes and the sweetest disposition. In the shirt time we have had her she has done well with other dogs as well she is living with a foster pup sibling Mac. She also doesn't react to cats, and does great with kids. Luna is housebroken. Crate trained, and walks nicely on leash. She is such a smart girl and just loves life ❤️ She will have the rest of her vetting completed this week. If interested in meeting her, please go to our website and fill out our Online application Www.atailof4paws.org
We'll also keep you updated on Sweet Pea's adoption status with email updates.
Special Needs
Photo of Sweet Pea

Sweet Pea

American Pit Bull Terrier Labrador Retriever

Female, 3 yrs 7 mos
Romeoville, IL
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs, Good with cats, Needs special attention, Spayed or Neutered,
Story
*REAR PARALYZED* Sweet Pea came to us from Arkansas where her family had surrendered her as a young puppy saying the mom dog stepped on her. Based on x-rays Sweet Pea has a spinal deformity that our vet believes was a genetic issue and not one due to trauma. She is rear paralyzed, but loves her cart! She does not know when she needs or is going potty. We do express her several times a day to keep her comfortable, clean, and dry. She does wear a diaper when she is not in her crate. She gets along with other dogs, cats, and kids. She absolutely loves all people and has never met a stranger. We did a DNA test on her and her main breed came back as American Pit Bull Terrier, although we were told the mom was some kind of shepherd mix. She is petite - only about 35 lbs and not super stocky. Sweet Pea was guessed to be born in April of 2022, so she is still young. She loves to play with the other dogs and has a good energy. Sweet Pea's adoption donation has been waived to a qualified home. She will come with her special crate, wheelchair, and harness. Application, reference checks, and home visit required. For more information on adopting, please email us at info@perfectpooches.org. If you are interested in adopting, please complete an adoption application, which can be found on our website at www.perfectpooches.org under the Adoption Process tab. All dogs are spayed/neutered, current on vaccines, heartworm tested (age appropriate), fecal tested and/or dewormed, and microchipped.

Search for a Boxer puppy or dog

Use the search tool below to browse adoptable Boxer puppies and adults Boxer in Lockport, Illinois.

Boxer puppies and dogs in nearby cities

Boxer Puppies near me Boxer in Addison, IL Boxer in Alsip, IL Boxer in Arlington Heights, IL Boxer in Aurora, IL Boxer in Bartlett, IL Boxer in Batavia, IL Boxer in Bellwood, IL Boxer in Bensenville, IL Boxer in Berwyn, IL Boxer in Bloomingdale, IL Boxer in Blue Island, IL Boxer in Bolingbrook, IL Boxer in Bourbonnais, IL Boxer in Bradley, IL Boxer in Braidwood, IL Boxer in Bridgeview, IL Boxer in Broadview, IL Boxer in Brookfield, IL Boxer in Burbank, IL Boxer in Burr Ridge, IL Boxer in Calumet City, IL Boxer in Calumet Park, IL Boxer in Campton Hills, IL Boxer in Carol Stream, IL Boxer in Cedar Lake, IN Boxer in Channahon, IL Boxer in Chicago, IL Boxer in Chicago Heights, IL Boxer in Chicago Ridge, IL Boxer in Cicero, IL Boxer in Clarendon Hills, IL Boxer in Coal City, IL Boxer in Country Club Hills, IL Boxer in Countryside, IL Boxer in Crest Hill, IL Boxer in Crestwood, IL Boxer in Crete, IL Boxer in Darien, IL Boxer in Des Plaines, IL Boxer in Dolton, IL Boxer in Downers Grove, IL Boxer in Dyer, IN Boxer in East Chicago, IN Boxer in Elburn, IL Boxer in Elgin, IL Boxer in Elk Grove Village, IL Boxer in Elmhurst, IL Boxer in Elmwood Park, IL Boxer in Evanston, IL Boxer in Evergreen Park, IL Boxer in Flossmoor, IL Boxer in Forest Park, IL Boxer in Frankfort, IL Boxer in Franklin Park, IL Boxer in Gary, IN Boxer in Geneva, IL Boxer in Glendale Heights, IL Boxer in Glen Ellyn, IL Boxer in Glenview, IL Boxer in Glenwood, IL Boxer in Griffith, IN Boxer in Hammond, IN Boxer in Hanover Park, IL Boxer in Harvey, IL Boxer in Harwood Heights, IL Boxer in Hazel Crest, IL Boxer in Hickory Hills, IL Boxer in Highland, IN Boxer in Hillside, IL Boxer in Hinsdale, IL Boxer in Hoffman Estates, IL Boxer in Homer Glen, IL Boxer in Homewood, IL Boxer in Inverness, IL Boxer in Itasca, IL Boxer in Joliet, IL Boxer in Justice, IL Boxer in La Grange, IL Boxer in La Grange Park, IL Boxer in Lansing, IL Boxer in Lemont, IL Boxer in Lincolnwood, IL Boxer in Lisle, IL Boxer in Lombard, IL Boxer in Lynwood, IL Boxer in Lyons, IL Boxer in Manhattan, IL Boxer in Manteno, IL Boxer in Markham, IL Boxer in Matteson, IL Boxer in Maywood, IL Boxer in Melrose Park, IL Boxer in Merrillville, IN Boxer in Midlothian, IL Boxer in Minooka, IL Boxer in Mokena, IL Boxer in Montgomery, IL Boxer in Morris, IL Boxer in Morton Grove, IL Boxer in Mount Prospect, IL Boxer in Munster, IN Boxer in Naperville, IL Boxer in New Lenox, IL Boxer in Niles, IL Boxer in Norridge, IL Boxer in North Aurora, IL Boxer in Northlake, IL Boxer in North Riverside, IL Boxer in Oak Brook, IL Boxer in Oak Forest, IL Boxer in Oak Lawn, IL Boxer in Oak Park, IL Boxer in Orland Hills, IL Boxer in Orland Park, IL Boxer in Oswego, IL Boxer in Palatine, IL Boxer in Palos Heights, IL Boxer in Palos Hills, IL Boxer in Park Forest, IL Boxer in Park Ridge, IL Boxer in Plainfield, IL Boxer in Plano, IL Boxer in Prospect Heights, IL Boxer in Richton Park, IL Boxer in Riverdale, IL Boxer in River Forest, IL Boxer in River Grove, IL Boxer in Riverside, IL Boxer in Robbins, IL Boxer in Rolling Meadows, IL Boxer in Romeoville, IL Boxer in Roselle, IL Boxer in Saint John, IN Boxer in Sandwich, IL Boxer in Sauk Village, IL Boxer in Schaumburg, IL Boxer in Schererville, IN Boxer in Schiller Park, IL Boxer in Shorewood, IL Boxer in Skokie, IL Boxer in South Elgin, IL Boxer in South Holland, IL Boxer in St Charles, IL Boxer in Steger, IL Boxer in Stickney, IL Boxer in Streamwood, IL Boxer in Sugar Grove, IL Boxer in Summit, IL Boxer in Tinley Park, IL Boxer in University Park, IL Boxer in Villa Park, IL Boxer in Warrenville, IL Boxer in Westchester, IL Boxer in West Chicago, IL Boxer in Western Springs, IL Boxer in Westmont, IL Boxer in Wheaton, IL Boxer in Willowbrook, IL Boxer in Willow Springs, IL Boxer in Wilmington, IL Boxer in Winfield, IL Boxer in Wood Dale, IL Boxer in Woodridge, IL Boxer in Worth, IL Boxer in Yorkville, IL

Related breeds in Lockport, Illinois

Boxer shelters & rescues in Lockport, Illinois

There are animal shelters and rescues that focus specifically on finding great homes for Boxer puppies in Lockport, Illinois. Browse these Boxer rescues and shelters below.

Here are a few organizations closest to you:

Rescue

7.2 miles

Ruby Whiskers Animal rescue

12305 S. New Ave, Suite O, Lemont, IL 60439

Pet Types: cats, dogs

More an arrow icon

Rescue

9.5 miles

Starfish Animal Rescue

P.O. Box 1355, Plainfield, IL 60544

Pet Types: cats, dogs

More an arrow icon

Rescue

11.9 miles

Wagging Hearts - Naperville

1552 South Rt 59, PO Box #1487, Naperville, IL 60564

Pet Types: cats, birds, dogs

More an arrow icon

Rescue

12.1 miles

Forget Me Not Animal Rescue

PO BOX 483, Manhattan, IL 60442

Pet Types: cats, dogs

More an arrow icon

Rescue

13.4 miles

Angel Dog Alliance

Naperville, IL 60540

Pet Types: dogs

More an arrow icon

Shelter

13.9 miles

Animal Welfare League

10305 Southwest Highway, Chicago Ridge, IL 60415

Pet Types: cats, birds, dogs, rabbits, small animals

More an arrow icon

Rescue

14.9 miles

Rescue Riders Cooperative IL

Chicago, IL 60563

Pet Types: cats, dogs

More an arrow icon

Shelter

16 miles

South Suburban Humane Society

21800 Central Ave, Matteson, IL 60443

Pet Types: cats, dogs

More an arrow icon

Rescue

16.6 miles

Caffeinated Canine Rescue to the Midwest

7175 Kingery Hwy, Meet Transport at Starbucks, Willowbrook, IL 60527

Pet Types: dogs

More an arrow icon

Rescue

17.3 miles

Lucky Tails Rescue - IL transport

211 Pine Branch Drive, chicago, IL 60638

Pet Types: dogs

More an arrow icon

Looking for a specific shelter or rescue?

If you're not seeing what you're looking for, try our shelter and rescue search. We have more than 17,000 organizations in our database with furry pals waiting for a new home!

magnifying glass with cat and dog

Want to learn more about adopting a Boxer puppy or dog?

We've got all the info you need on adopting and caring for a Boxer puppy. Check out the links below for everything you ever wanted to know about Boxer puppies and adults.

Boxer basics

clipboard with list

Where do Boxers come from? How many types of Boxers are there? From the history of the breed to question about average height, weight and size, brush up on these basic facts about the Boxer.

Learn More an arrow icon