My pup is 11 months old.. He has so much energy all the time! All he wants to do is play, play, and play. However, he doesn't like to eat much therefore he is underweight. I've tried different types of food..wet and dry, different brand, etc. and nothing seems to please him.
My concern is; is it normal for him to want to play so much all the time or did I buy a crazy yorkie

?
ps. He spends a long time home alone while I am at work. Could it be b/c of that?