House hacking and roommate brought dog over

[Michael Dallas]

So I am house hacking my first house and I have 4 other roommates. They asked me before I wrote up a lease if he could bring a dog. And I said yes but he would have to pay a small fee. But he said never mind he isn’t going to bring one. So I didn’t worry about it when I drafted my lease that they all signed. In the lease I didn’t add a pet clause which is my fault. But I got home today and he has a dog here. He might just be taking care of it for a little bit I haven't asked yet. Do y’all have any suggestions about how I should go about this?? I love dogs but I know they will cause more wear and tear to the house along with any messes they cause. Thanks for the advice!