I am starting to get worried about Zippy, he is sleeping much longer in the morning and during the day. I don't know could it be because of us, we work till late at night (at home) like 4-5pm and he sleeps around 11:00-12:00pm wakes up an hour or two later sometimes he even plays (late playing doesn't bother us since we are awake)he wakes up at 8-9 am, he eats and comes to our bed where he continuous sleeping till 10:30-11:00 (sometimes even more, we wake up and he wants to sleep more!)...is that to much? he is still a puppy but even during the day he sleeps more, when he is awake he is active and very hyper outside. He is teething now could that also be the reason? Is he just adjusting to us or should I be concerned???