Why do dogs pee on other dogs?

Some dogs urinate in the house because they're scent marking. Dogs scent mark for a variety of reasons, including to claim territory, to identify themselves to other dogs and let them know they've been there, and in response to frustration, stress or an anxiety provoking situation. read more

When your pup urinates on another dog’s puddle, he is, in a sense, “canceling out” that dog’s mark on what he perceives to be his territory. Your dog may do this to strange dogs he meets in public, to neighbor dogs or even other dogs in his household as a way to establish territory and assert dominance. read more

Some dogs only urine mark when visiting homes where other dogs have urine marked before. Other dogs only urine mark when they become highly aroused and overstimulated in social situations. These dogs often mark nearby objects, people or other dogs. Anxiety. Some dogs urine mark when they experience anxiety. Anxious dogs might deposit greater amounts of urine than dogs marking for other reasons. read more

Dogs often cover up other dogs' urine as a means of expressing social power. If a dog feels tougher and more "alpha" than another individual he perceives to be meek and timid, he might communicate that by concealing the other furry guy's pee with his own. read more