I have a two year old bird dog/terrier mix. She was originally my dd's dog, but you know how busy teenagers are.. Anyway, dd has been gone quite a bit this summer, and when she is home, it's only for a day or two. Sweet Pea (dog) is so attached to dd, she is over the moon happy when she is home. However, I've noticed that when dd is gone, pup will sleep all day. It seems to only be the first day she is gone that the pup does this. Then she bounces back, and is fine. Other people are home; myself and two other teenagers. We give her lots of attention, and things, but still the first day dd is gone, Sweet Pea will sleep all day. Is she moping? In all other respects, she is happy and healthy. Eating fine, running around and playing. I'd appreciate any insight you can give on this behavior. Thank you!!