No convictions involving cruelty to animals.That pretty much eliminates anything that would present a danger to your other tenants. 

Otherwise, if a cat scratches the sofa, that's the tenant's sofa, unless you're providing the place furnished, so not sure why you'd care about that.Finally, declawing cats is animal cruelty.

Provide proper care for the pet in accordance with veterinary recommendations or ASPCA (American Society for the Prevention of Cruelty to Animals) guidelines.

I see the renter leave and just abandon the dog.. i have seen them stake the dog in the back yards with no water in 100 degree heat no shelter.. its animal cruelty that these owners for whatever reason seem to have to no regard for common decency and Ptts tend to be the dog of choice for them. 

Provide proper care for the pet in accordance with veterinary recommendations or ASPCA (American Society for the Prevention of Cruelty to Animals) guidelines.

Its not cruelty is reality business runs on numbers not on ur feelings, this of course does not preclude from helping them in any way that you can.

I would evict them and turn them into the police for animal cruelty.. some of the things I have seen with dogs is just something I simply cant comprehend.. 

BUT, it is NOT enforced because of questions on cruelty to the tenant who lived there all their life.The way I look at it, until we take out the human factor, Housing will continue to become more inefficient.

Likely they will just neglect the cat and I hate animal cruelty. 

I'm not buying this story of the evil landlady and the helpless tenants exposed to her merciless cruelties, Brian.