Lease violation, tenants have 2 dogs, only one was in the lease

[Fausto Suriel]

hi,

Im very new to rental properties and thanks to Brandon Turner and his books i wil be in the game for the long run.

My issue is the following; I just found out my tenants have an extra dog and person living in the apartment that were not part of the lease. We agreed to 1 companion dog only. But today i was doing some work around the house and saw this new person walking this dog. I asked the neighbors upstairs to make sure they were not just visiting. They have been there for about 3 weeks now, according to the neighbors. I have not confronted them yet because im not sure what is the right thing to do.

These tenants are ALWAYS early (10 days) with the rent, although they do complaint about any little thing (even when visitors ring their bell by mistake) and are not the cleanest. 

What would be the right move here? I was thinking about asking them to move out  the dog and extra person or terminate their lease which has 9 months left. Would i be entitle to any of the deposit? Since they’re the ones in violation.

Thank you