Check out our sister brand, Kinship, for vet chat, a nutrition calculator, basic obedience training, and (much) more. So you're never flying solo in this pet parenting thing.
The easiest way to adopt a Parson Russell Terrier is through a rescue that specializes in this breed or small terriers in general. A great place to start is with a breed search on Adopt a Pet, which will show you all the available Parson Russell Terriers in your search radius.