www.aspca.org/pet-care/virtual-pet-behaviorist/dog-behavior/urine-marking-dogs
Some dogs never mark in their own homes but will mark when they visit others’ homes. A dog is especially likely to urine mark when visiting a home if another dog has previously marked in that home. Dogs who become highly aroused and stimulated in the presence of other dogs, especially in large, gregarious groups, sometimes “zone out” and urine mark any object in the area, including other dogs and people’s legs. On rare occasions, dogs who mark frequently during walks become highly aroused and continue marking when they return to their homes.
Some dogs never mark in their own homes but will mark when they visit others’ homes. A dog is especially likely to urine mark when visiting a home if another dog has previously marked in that home. Dogs who become highly aroused and stimulated in the presence of other dogs, especially in large, gregarious groups, sometimes “zone out” and urine mark any object in the area, including other dogs and people’s legs. On rare occasions, dogs who mark frequently during walks become highly aroused and continue marking when they return to their homes.
