Is your Pom Male? If so is he neutered?? Should have it checked by the vet, it may be something wrong with it, and he can't help but to pee everywhere. I've seen this before. Dog went every where over and over, find out he had to have surgery due to an obstruction. If it is male, have him neutered that may help. It's better for them to be neutered (if he isn't.) Having them spayed helps prevent breast cancer