Animals raised in homes, without needing to provide for themselves, with a warm place to sleep and a nice bowl of pet food every day, are NOT necessarily going to survive if left on the street in the middle of the winter without a source of food.
But leaving that aside, nobody is asking YOU to donate money to the ASPCA or anywhere else. If anyone wants to, that’s their cheshbon, and I wouldn’t be too sure that person is getting an aveirah, either- it may not be on the level of real tzedakah for all I know, but the issur against tzaar baalei chaim is a real thing. Feel free to have better and loftier priorities than all the idiots who get suckered into caring about the welfare of these briyos- but what other people do with their money is truly not your concern.