I am willing to work with them, but am fortunate since we are NOT over-leveraged.If you follow these posts with guys wanting to buy stuff for nothing-down, those are usually the types that make life miserable for good tenants since dollars drive them.However, I get a bad tenant and I can return the favor.Anyways, for your cynical self, I guess I'd like to make society better by rewarding (and hopefully encouraging) good behaviors.

The tenant eventually brought in a partner, their child, and a dog.

I work for a property management company in Milwaukee, Wisconsin, with this unacceptable behavior we would likely take this as an opportunity to pursue new more responsible residents.

Door hangers, walking my dog through the neighbourhoods, joining local boards/chambers, attending any networking event I can on the Meet Up app, joined a couple of different gyms, just trying to get out there as much as possible.

I called her up I told her exactly my feeling about her pets, this is one thing you need to be in this business is open and truthful, what I said is I never owned a pet in my life, they smell the pee alL over and oh yea your dog is the one that doesn’t pee, yea ok!

On the pet addendum, this tenant mentioned that she had a cat and a dog. 

I thought of this while walking my dog haha.

So that is 4 adults , 2 dogs and three cats.

All through 2020, he's let his dog fill the front yard with crap and they'd only occasionally clean it (he got a new male roommate that I put on the lease), and he fell way behind in grass cutting and dog yard cleaning. 

Have you talked with the escrow company about the situation, the seller's behavior, and your options?