If the building has 4 units or less and the landlord lives in one of the units.If the property is a SFH and the owner owns less than 3 SFH's.If the animal brings an undue financial hardship to the landlord.If the animal causes damages or harm to others in the building.I recently got rid of a tenant who marked "no pets" on their application for a unit that was advertised with a strict no pets policy, and then within a month of moving in, during a scheduled inspection, I found they had a dog and a cat (penned up all day in big piles of their own poop and urine, bordering on animal cruelty).

You were born screaming in pain, covered in blood and urine and feces.

Homeless EVERYWHERE - car smash and grabs, drugs, every bus bench taken over by a homeless encampment, trash, feces, urine. - its just gross.

Don't ask for the "mens room" or "ladies room" when you have to urinate in a public venue.

The cities and towns are being taken over by homeless, druggies, crime, feces, needles, urinating etc.

Turnkey dad buys a property at market value, makes nothing on the buy, pays someone to PM and turns an ongoing ROI of 10% with some good luck.Cat urine dad buys a stinker, makes 25% on the buy and rehab, self manages and turns an ongoing ROI of 20%.Best, Terrell

Urine is to be immediately washed with water from the hose to prevent the grass from yellowing. 

The dog urine got into the sub-floor and they were smoking.What I would do is make sure that's not happening to your property. 

That way you'll get a real address.Next, I hired out all the painting (it needed it only because of the smoking, not normal wear and tear) and flooring replacement (their dogs completely soaked it to the subfloor with urine and it was new).  

Your family thinks it wastes time away from them ,the tenants think your evil and a greedy oppressor ,The city thinks your a profiteer trying to get bilk money from the townspeople.. my advice is don’t make it personal your just going to be let down when the tenant leaves you With no rent ,a dead hooker stuffed in the closet and  cat urine soaked carpeting