I know this is probably a stupid question, but I haven't had a puppy in 15 years. My chow pup is a bit off, he's just around 5 months. He spent the night at my parents and they said he barked the entire night, which is unusual. I asked if they were sure he had been out [as that's really the only time he's barks in crate] and they said they were sure he had everything taken care of. Ok so I got him back this morning and he's just 'off.' He doesn't seem sick, just sluggish. His appetite seems just fine. Usually he plays a bit and is more alert/active but he's just been snoozing all day. Usually he poos every time I take him out too, and he's only pooed once today [if that means anything]. If I take him out or go to another room, he's right up and with me..so seems fine there. I was just wondering if maybe he was going through a growth spurt and that would be the reason for his lack of energy? Or should I be more concerned? If a growth spurt, is there anything I can do to make it a bit easier for him?