My name is Mickey!

This is Mickey, he is roughly 13 years old and is a snuggle bug. It’s my brothers dog and he is no longer being properly taken care by him. Mickey will go without food or water for days unless I notice and feed him. He is constantly left alone and locked in a mold filled basement because he aggressive with other dogs and can’t be around the others in our home. He has a severe allergy to fleas causing him to lose some of his hair on his butt. Mickey also suffers with separation anxiety and hates lawn mowers. He will chase and kill other wildlife like squirrels and opossums. He is great with cats and kids. If he is stressed he will nip kids but nothing hard. I feel really bad and just want him to be properly taken care of since he is currently getting neglected. I can’t take care of him cause I own another dog.