Buster was neutered when he was young and only marks outside. Have you cleaned the area's inside that have been previously marked with an enzyme spray? It sounds like your dog is a marker and I think they will continue to mark even after being neutered. I hope people will more experience will be able to help you out with advice.
__________________ Carolyn  Buster Brown  
"The happiest people don't have the best of everything, they just make the best of everything." |