Esp the fox urine - I tried that to get rid of raccoons that shit in yard (bad news, the worst poop I've ever encountered possibly tie with homeless stuff on the outside wall of a locked bathroom in a park in Seattle that one time) - and it is FOUL STUFF.

Edit: Ironically given other suggestion in list, what ended up finally ending the scourge (since once they start pooping in a "safe place" they like to return)(and knock on wood) was spraying weed spray (it just happened to occur to me while I was in fact spraying weeds) wherever they pooped/after I got rid of it. They seemed to really not like that smell so after chasing the pooping point around the yard a bit it eventually tapered off.

Esp the fox urine - I tried that to get rid of raccoons that shit in yard (bad news, the worst poop I've ever encountered possibly tie with homeless stuff on the outside wall of a locked bathroom in a park in Seattle that one time) - and it is FOUL STUFF.