[Onni]

If it were me; I would start looking for another place to live, because if they are capable of that kind of tacky behavior, they won't stop there, and I would suspect living there with a pet or no pet will eventualy become a huge pain in the rear.

I would also call an attorney. You signed a lease under one understanding and they are changing that lease now. I would venture to say you may have a case, and if enough of the current residents banned together, you may have a class action law suit. To hold you accountable to the lease when THEY changed the peramiters is wrong at the very least and may be a point for a law suit.