関連ワード:
do dogs sleep more when they're older do dogs sleep more when they get older do dogs sleep.more when they are older do puppies sleep more when they get older do dogs sleep more deeply when 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 or less as they get older how long do dogs sleep more as they get older do dogs sleep longer when they get older
