Originally Posted by rambler

Are you going to leave the puppy home alone during the day?(I'm assuming you go to college/work during the day)

If the landlord won't budge, then go to your local tenant authority to try to claim some damages. And you should move out because you are going to feel real uncomfortable staying there if there is tension between you and your landlord/roommates.
OR

You could make love to your landlord and see if she will loosen up