What would cause a long time housebroken dog to mark?
5 year old male, housebroken since 3 months old, neutered at 11 mo (because he was starting to mark the house), gets two walks a day and some off leash time, lots of potty breaks because we're at home and have a garden. No behaviour issues except doesn't like grooming very much...
A few days ago he walked in my bedroom and let out a small wee. Not a proper one, like he was desperate for a pee. Kind of marking sprinkle. He did do this in the living room carpet about 6mo ago (although I didn't witness this, but found the lovely arc shape stain!!)
We did get him a female (spayed) companion about a year ago...is he marking because of her? Or does everyone's male do this once in a while?