Since December 1st my 2 year old beagle blue tick has lost about 5-8 lbs(I can see all his ribs and his hip bones) and he sleeps a lot more. He has been neutered( 1 year ago.) He does eat but we've had to buy a different brand of dog food. He has no problems using the bathroom. If we do something he will follow us around but if we are just laying around all he does is sleep. He is inside when we are home and outside in a barn when we are not home. I don't know if something is wrong or if he's just getting older.