hi ya when we had salem on his own he used to bite quiet abit and scratch sort or playin but he could really hurt but at ten week just over we had him from 6 weeks we got him a little friend girly cat ten days younger then him and he changed so much , he is so calm now and very placid , u wouldnt belive he is the same kitten he is 17 weeks now and the was the best thing i ever done geting him a friend so maybe it might be worth chattin to your friend about maybe getin another kitten to sort of show him his play is to rough and calm him down abit if that makes sence luv becks x