I have a 9 yo male mini dachshund, not neutered.. In general he is such a good dog. He never peed inside until I moved in with DH 1.5 yrs ago. It's like that pissed him off and he started peeing in corners upstairs and on our rug in the living room (we have hardwood downstairs, carpet upstairs). I have tried everything to get him to stop! The carpet upstairs was dingy so we replaced it. We put a gate up so he can't get upstairs without us. About 1.5 weeks ago we replaced the rug downstairs because the old one had urine stains and we have a 2 mo old and I would like it to stay nice so he can sit/practice crawling on it in the coming months. We sprayed the rug with a 50:50 mixture of vinegar water because I read that will discourage him from marking as they don't like the smell. We even have him wear a "belly band" (like a doggie diaper) a lot of the time, but it slips down and DH isn't the best about putting it back on him after we let him out. Lo and behold this a.m., our new rug has its first pee spot! Soooo frustrating! Any suggestions to stop this behavior? (please don't say neuter him, the vet says it won't help at this ge in his life anyway)