Dogs and Cats are unique creatures in that they can quickly become part of a family of beings from another species; or they can cause massive rifts between groups of people. All pets share this gift; when your roommate has one, only part of that decision is up  to you. Sometimes, you will click with the pet and there will be no problems at all; if that's the case, great! If you're constantly finding yourself threatening to make Chinese food out of the pet on the other hand, then take a second to let out some of that rage: yell, or throw something at a wall, or lift weights. I'll wait here. 

Feeling better? Good. Here's the bad news: Getting the roommate to get rid of the pet is an option, but it's not a good one. If they can't send it to family or a friend, the poor thing could end up in a pound. No matter how annoying the pet is, it's a fate they don't deserve. So I'd say it's the last resort, let's talk other ways.

The first step is with you: Consider for a moment, are you being too hard on the critter? Yes, peeing on your shoes and eating your homework are terrible things. Can you make small compromises with the animal to prevent that from happening? Putting your shoes and homework out of their reach and closing doors, for example. Or, perhaps you need to take a more psychological approach and read up a bit on how cats and dogs think—one of the biggest mistakes a lot of new owners (and their roommates) make is assuming they follow the same brand of logic as humans; they do not. A quick Google search will pull a few things up. 

If you're making some changes and you understand the pet so well, you know they're going to sneeze before even they do, then perhaps it's something the owner can do. Here are a few:

• A little training goes a long way.
• Routine: Animals thrive on it. See if your roommate can try and get home around the same time each day, so that the animal knows when food is coming and when not to be annoying.
• Boundaries can also save you a bunch of headaches: it may seem cruel to crate a dog or lock a cat in a bedroom, but it actually helps them to be somewhere where they understand the rules.

Those few things should seriously help. If they still don't, a conversation with your roommate about next steps is essential. Be understanding and give the pet a chance, who knows, maybe there's an animal lover in you yet!