Had to replace one plank once that we figured tenant left dog urine sitting there for extended period of time which lifted the plank.  

This was in Marietta Ga and we don’t have terrible water issues there, I think it was the ammonia from urine missing the bowl that caused it to fail.My 2 cents

Have no idea who's right & wrong here, but if you're going to speak negatively about someone, you should share better facts.The tenant destroyed the floors, some of the walls, appliances and urine smell all around the house, burnt a tree which clearly shows the quality of tenant. 

I showed up to the vacant apartment and It smells strong of cat urine.

Makes the urine-soaked, matted rug in my 4plex that some people couldn't bear, look like child's play!

In fact, you have to dig in to your savings every month, just to keep the doors open so you can continue to lose money next month.Do your homework and maybe you'll find a good franchise, but like a toddler at a urinal, you have to stay on your toes.

Tile is not great either because the urine will get into the grout joints (yes, even if they're sealed) and you'll have to regrout.

On larger sites you could have porta johns every floor and still find 100's of urine bottles in the walls as well as food thrown in the walls and other stuff. same goes for residential construction.

I was just complaining about cat urine in the carpet at my rental after walking it with the cleaners.

Urine and heavens knows what else.