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. 

@Jeff Rabinowitz  It sounds like their behavior is escalating.  

A pardon based on new evidence that exonerates the convicted person is much better than a pardon for social / political / good behavior reasons. 

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

At minimum, you may be able to use the problem regarding the dog to lower the price with the seller.I think there are insurance companies out there now that will cover pit bulls with no history of aggressive behavior.  

Besides the dropping that will be on every square foot of carpet that will turn it into a gurgling primordial ooze a large bird with any sort of stress or behavioral issues will often act out in a destructive manner. 

It's a whole different ball game for us with a very different set of rules about drunk behavior among friends or in public than here in the States.We are, granted, not generally perceived as a deeply inhibited and socially reserved people when sober.

You can't evict someone for being mentally ill, but you can evict for behavior that violates the terms of the lease.