Go is 9 months old and the youngest of my cats. He is different. One minute he is a ball of super energy (jumps, climbs, chases anything that moves, gobbles up his treats and insists on a playing tag). Then suddenly he sits and falls asleep. Nothing can wake him up for the next few hours. Then when he opens his eyes the craziness will start again. The others seem to be more balanced and they are one month older and above. None have acted like Go at his age. Is this normal behavior?