Animal control was my least favorite job ever. I was not suited to it at all, as I hated confrontation. I worked in a small, fairly "upscale" city, so it was mostly "my neighbor's dog is barking" type stuff, or "it's still sunlight, and I saw a raccoon. It must be rabid, so please come shoot it."
Plus, there is no worse feeling than being bound by the law. The city had the common rule that all dogs with food, shelter, and water were being adequetly cared for. Nothing like having to tell people, "Yes, I agree with you. That dog's life sucks, but there is nothing I can do about it." Or dealing with the outrage when a professional dog trainer's e-collar malfunctioned and started zapping the dog non-stop at a very busy park. Uggh. Seriously, the next time you want to vent about animal control officers (and it happens quite a bit), take a moment and remember that they have to follow the laws, too.