関連ワード:
do dogs sleep more or less as they get older do dogs sleep more as they get older do dogs sleep more as they get older at night do dogs sleep more soundly as they get older do dogs sleep more deeply as they get older do dogs sleep longer as they get older do puppies sleep more as they get older do puppies sleep longer as they get older do dogs need more sleep as they get older how long do dogs sleep more as they get older
