Pis$ing contest

Are they neutered? If not, perhaps that would help...

I know that white vinegar take's the smell out and that can help. If they can't smell the pee they may not go back to the same spot. I have done this befor for cat's and dog's.

Neuter them if they aren't or you could try Belly bands when they are in the house. Lots of breeders use those when they have in tact boys and girls in their house.