tourists do this on the rez all the time they steal other people's dogs to "save" them
Found my dog on a rez and everyone kept looking at me like I was nuts for going around asking “Hey is this your puppy?” Later found out they have a massive wild dog problem. People just kept telling me to take her. 🤷🏼♀️ Still looked for a human she belonged to or even a mama dog and other puppies.
If it was abandoned, then I’d say finders keepers?