関連ワード:  why do dogs scratch their back legs after peeing    why do dogs scratch their back legs after pooping    why do dogs scratch their back legs on the ground    why do dogs scratch their back legs    why do dogs scrape their back legs    why do dogs scratch their hind legs    why do dogs scratch their back feet after pooping    why do dogs scratch their back feet    why do dogs scratch their back feet on the ground    why do.dogs scratch their back.paws