This is incredibly long and I apologize. I just tried to get as much information out as possible for the fairest verdict.

While we were going through the process of putting our  house up for sale, some friends wanted to rent it. We talked about it for a bit, and decided to offer to let them rent the house off of us for just the mortgage price -- without us making any money from the deal.

One thing led to another and the friends ended up moving in early. We're still not due to move until the summer, but they moved in back in January. We agreed to let them, and only charged rent -- no utilities since we have decent jobs, trying to be nice,

Throughout their staying here (at the time of this writing it's been a little over two months), one came to us asking if she could get a dog. We own three dogs ourselves, so we really didn't see the harm. My wife and I have 3 medium-sized dogs so it was surprising when she got a very large Husky.

This dog is huge. The door to her room is now scratched all-to-pieces where the dog wants to be out. The dog also destroyed the backyard and the screen on our back window. I will admit that some of it was probably from my dogs as well. They're not entirely innocent.

My other friend felt as if she was incredibly lonely. Not having a pet, she requested if she could get an animal. She wanted a cat and we declined because my wife is allergic to cats. After a while of discussion she ended up talking us into it. Honestly, my wife and I are pushovers.

I work from home. Saying that, I'm home a huge portion of the day. Our friends are at college or just out hanging out with their other friends until 11:30-12. So, everyday we sit at home all day having to hear the cat's cry all day nonstop. Neither of us can show it attention seeing as how she's allergic and I would have to scrub down/change clothes anytime I came in contact with it.

Husky friend has also had her boyfriend staying here for the entire month. He doesn't really do anything. He's just living here using up the utilities that my wife and I are paying for. Initially when it was brought to my attention that he was coming, it was for the weekend. I feel like this is slightly unfair to my wife and myself since we're having to spend even more money on utilities.

My wife and I are still the ones buying the toiletries, dish soap, laundry detergent, pretty much any consumable used in the house. They do buy their own food but I'm stuck doing their dishes and cleaning up after them in the kitchen. I can't say they dirty up the communal areas much. Their rooms are absolutely disgusting and  foul-odors are coming from them.

TL;DR: My friends moved in, got a dog and a cat. Dog tears things up and cat constantly meows to the point my wife and I are staying insanely stressed. Recently discovered wife is pregnant so the stress is extra not good.

I really want a fair outside opinion.