What are you supposed to do? If the animal looks healthy, animal control is going to think you're the crazy one. The owner has the right to take care of their animal the way they feel is appropriate. You can't say that way is wrong until it shows that the animal is neglected or abused in some way.
When my friend's roommate had that burm, I tried and tried to talk them into giving it to a rescue, to housing it differently, to feeding it more often. I was there every other week at most, and nothing I said made any difference to that roommate. She finally hid the snake in her bedroom because every time I saw it I'd mention something I saw wrong with the snake or cage. When I heard my friend was moving out, I helped out and while I was there peeked into the room to see how the snake was doing. When I saw how it was living (more feces than bedding, mites crawling all over the skin, no heat, no water, 4 foot burm as skinny as a corn snake), I called animal control. My friend moved out that weekend, so I never found out what happened to the snake, but I hope the roommate got in a lot of trouble.
When someone refuses to take care of an animal, refuses to give up the animal so that it can go to a home with adequate care, refuses to let you take the animal, what are you supposed to do? I feel that it is wrong to let yourself get taken advantage of caring for an animal that the owner can't be bothered to care for themselves. Not only that, but if anything goes wrong, the owner has a scapegoat - YOU. "Well, so-and-so was taking care of it, I don't know why it's looking so horrible now."
It's just a no-win situation. All you can do is wait and try and help when the time comes.
If you have a better solution, I'm all ears.
~jenny
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"Polysyllabism in no way insures that what you're saying is actually worth being heard." - Blake (an e-friend of mine)
"I have never made but one prayer to god, a very short one: "O lord, make my enemies ridiculous." And he granted it." - Voltaire