Who wouldn't agree with saving an animal(s) in distress? No one. When the cops start coming in under the guise that they saw a dog from the window that appeared to be hurt or heard a cat that sounded like it was in distress to gain entrance into your home sans warrant, you are screwed. You and your pets.
Let's also look at dumb ass neighbors wanting to get even with for not raking leaves or some other idiocy (you can insert you ex here or a coworker who hates you, whatever)... They tell the cops that they saw you beating your dog. Cop comes by. You aren't home but they hear your dog. Oh no! The dog needs help. I'm coming in. Do you really think this won't happen if hasn't already?
There are better ways to support and help animals in need. Giving some cop these kind of powers is a HUGE mistake.