A gift accepted and received belongs to the recipient. Tell the donor to go to court if they want to take your dog back.

Then you will have to evict her. Be sure to provide all the proper legal notices.

He will have to evict you, giving you an opportunity to argue in court. You should start looking in earnest for a new apartment.

Sue for breach of contract, probably in small claims.

You contact Animal Control, obviously.

CAN he sue? Of course. Will he prevail? "Everything is under my name - adoption papers, city registration/license , vet records, pet insurance....

Sounds like the yo-yo scam. Discuss with the CO AG's consumer protection division.

Moving to lawsuits and disputes. File in her county - you need a judgment from there if you hope to collect.

Moving to consumer protection, so you get better answers.

To the extent they damage other tenants' property, it is a landlord/tenant issue. Given that she also lied about the dogs to you, I wonder why you...