Not only to keep them from being aggressive, but to keep dogs away from the property if a female is in heat, or have one that's not neutered run off and get somebody's poodle preggers.I'd also require renter's insurance with a rider for the dog, if there is such a thing.Ironically, the only breed that has ever attacked dogs of mine, all different types of terriers of around 20 pounds, have been german shepherds.

If you're not living there and not on the lease they can pound sand.

Here's the latest numbers on the phase out of R22.51 million pounds allowed in 2014 to 22 million pounds beginning Jan. 1, 2015.

Another example: A tenant of my daughter's complained to the PM that she was afraid a limb would fall off a tree in the backyard and hurt her 5 pound dog.  

We all feel like that sometimes, I'm an engineer and I have to explain to people that you can't pound in a face mill into a ER32 collet chuck in a $150k laser tool setter with a mallet

Then, eventually, it goes to a mandatory mediation session, where you could tell them you didn't feel it would be right to put an all female household potentially at risk with an unwanted male roommate.  

My 22 pound rat terrier is a great dog - sweet, friendly, rarely barks, housetrained.  

I cap at 25 pounds.

Did make one exception with one dog only under 25 pounds.

You should probably fix it as fast as you can as a broken window could be a point for unwanted entry.