SPOILERS!

I've seen a 'bad' ending, where you argue against the morals of what they're doing and you get put in the cages(presumably to be replaced by your dog), and I've gotten the 'good' ending, where you're told you've been great and he pulls strings to get your dog approved. I haven't seen what happens if you get fired, but I assume you either get thrown in the cages or your dog gets rejected.

It seems like most of the changes based on choice are in how the characters react/what they say. For instance, Martha doesn't ask you to promise to not reject cats if you don't reject the cat from the forms just beforehand. And if you play the model employee without rejecting Alan, he talks about feeling weird and how he hates the mailman and basically barked at him.

There's also if you reject Martha's cat, it zooms in on the cat's eyes and makes you feel terrible. But, you can get the 'good' end even with approving Martha's cat at the end(or, in my case, going "well, I'm already breaking the rules for this one" and approving another animal as well.) I haven't tried doing rejections on the documentary day, though. I assume you get fired, but you might just get a strike.