Since we returned from 2 weeks' vacation in Toronto this Monday, my 13-month boy has been sleeping unusually long hours. He seems to be tired all the time. He would be so tired he'd skip dinner altogether and just go to bed at 7:30pm and get up at 8am the next day (he did wake at 2 or 3am, played for 10 minutes then go back to sleep). His poop is also very soft and he is not taking as much solid and milk as he normally would. This is already the 5th day since we are back to HK time. Is this normal?