Our house broken irish setter, 4 years old, has suddenly started peeing inside the house over the last one week, almost every day. He chooses 2 spots whenever he does so- one outside one toilet, and then inside another toilet.
It is strange considering that in the last 4 years every since he was house broken. Please help us understand and break the habit

He may have a uti best to start with a vet visit and address or rule out any medical problems that he could be having.