I am a homeless advocate in San Diego. They do have some sweet dogs, but some are not at all sweet. I've been bitten by a couple of them while handing out water and snacks.

The real problem is that there is an entire subculture of breeders among the homeless that refuse to get their pets spayed or neutered. I will be the first to admit that no one that is homeless, that I have ever met, would ever think about their needs before their dogs' needs, so those pets aren't living nearly as hard a life as their owners. That being said, we have too many dogs and cats in this country. I don't know what the solution is. It's inhumane to take their pets from them. It's also inhumane to allow them to breed their pets willy-nilly, causing even more stray and feral dogs.