my mickey and bella are both 8mths old and they run around chasing each other and having fun.they jump on the bed off the other side into the other room, under the couch then bound back around onto the bed etc etc and both look totally mental with their tongues hanging out knackered and you know what.. i wouldnt change them for the world. like everyone else says, he is just a puppy and full of life and excitement.you should be delighted that your fur baby is so happy living with you. treat your baby with love and you will be truley blessed.