My tenant is taking care of other people's dogs

[Lee L.]

Hi BP,

This past weekend, I learned that the tenants in one of my units are taking care of 3 dogs that do not belong to them. According to the lease they are allowed to have 2 pets (1 large dog, and one small dog).  I believe one of the tenants is a dog groomer or trainer. They have a $250 pet deposit, and a security deposit = 1 month's rent. 

Now, there are 5 husky-sized dogs in the 650ft apartment. They seem pretty well-behaved, but I'd rather not have 5 dogs in the apartment.

What can I do?

Also, if it says in the lease that they could have 1 big dog and 1 small dog, but now there are two big dogs, is there anything I can do? My guess is that one of the dogs grew up. I didn't write the lease. Any advice would be appreciated.