Can neutering an older male dog stop house marking behavior?
This can be a frustrating problem in intact males! The first thing I would do right away is have Junior neutered - many times, this will decrease the marking behavior dramatically even if it's already been going on for several years.
After this is done, you will likely still need to work with him a bit on housetraining. Treat him like a young puppy who has no idea where to potty - take him out frequently, praise and reward for peeing outside, and supervise constantly indoors to prevent accidents. If you see him starting to lift his leg, clap your hands and say "ah-ah!" or "no!" - he will soon learn that this is not acceptable in the house, if you are consistent. Don't relax your supervision until he has had at least two weeks with no accidents at all, then increase his freedom in the house very slowly. This will take time and patience, but it can definitely be done.
Updated on September 23rd, 2025