関連ワード:  why do dogs scrape their back legs    why do dogs scrape their back legs after they poop    why do dogs drag their back legs    why do dogs scratch their back legs after peeing    why do dogs scratch their back legs    why do dogs drag their back legs on the carpet    why do dogs scratch their back legs on the ground    why do dogs scrape their back feet    why do dogs scrape their back feet after they poop    why do puppies drag their back legs