My jack Russell is 7, almost 8 years old. For some reason, he pees in the house sporadically. I also have a 7 year old pug. They are both males, and have been together for five years. I can't get a pattern of when the Jack is going to pee, but it is very frustrating. He is very loving, but I feel I am going to have to keep him in the kitchen after having run of the house for so long.