No more than two pets per household are permitted without specific owner's approval.Property Insurance Companies do not allow certain particular Breeds, either purebred or mixed.

Breed/weight/size limitations do not apply, except in the case of "aggressive breeds" that your insurance does not allow, AND a different insurance policy that DOES allow the breed causes you undue financial hardship.And you may not request proof of need for an obvious disability.I would stay away from this pet issue, and tell her you are not renewing her lease because of the state of the property.

Mastiffs are on some insurance company prohibited breeds list. 

.- No longer able to limit "vicious breeds" i.e.

It's why you see insurance companies so particular on what breeds they allow etc.

For higher rent, maybe add some amenities - washer/dryer, hardwood floors (or laminate), allow dogs or large breed dogs except for a restricted breed list.

That's not to say people cant snap out of it if they wake up, but our society breeds consumers!

I never had to carry out this plan when I was managing, but that was my plan.Also, if the breed of the animal will cause you hardship, because it's not allowed by your insurance, you can deny based on financial hardship, too.

If you are going to allow dogs, then know that any breed can be aggressive and any breed can bite.  

Then you are not open to all pets yet not closing off the possibility altogether....So, for example, one small well behaved dog you may approve  (especially one that a previous landlord says was not a noise, damage or other problem) but a pack of loud unruly ones not so much...And you can refine some of what you are looking for in terms of size, behavior, numbers, breeds, ages (no puppies without house training for me, eg), even spaded/neutered (especially for male cats, etc), references (ie how the owner did with a pet in past places), etc...