Learned that the hard way.Plus, a co-signer does not guarantee good behavior.  

I will say this though, from a long term perspective I highly encourage you to work this out and find a solution BEFORE this behavior involves you.

In fact, I believe your attorney is required by the bar to report him for unethical behavior. 

@Jeff Rabinowitz  It sounds like their behavior is escalating.  

In all of those situations, you now have the ability to give notice to those tenants that they need to correct their behavior or get out, because you were proactive.

ThanksJosh From what you shared, there is nothing unscrupulous in the tenant's behavior.

I'd go ahead and give them a 3 day notice to stop the bad behavior or get rid of the dog, or move. 

For example the one that I live in I put in no pets, no smoking, no sublet, no waterbeds, no inflammatory speech displayed in window,  can't use the roof, decorations must not destroy walls. 

One nicer tier for those tenants that are "better" - with respect to rent being on time, maintenance issues, and overall behavior.

Unless passive aggressive behavior is your pet peeve, then it seems it's no different if you had an overly sarcastic tenant or even an overly loquacious tenant.