Lucky we got straight from a tnr, trapped at a dumpster at 6 mos. old. (There's that magic 4-6 mos old!) We've had him now 7 months. He hates loud noise, plastic or paper rattling, or sudden movement. And he also really just tolerates being picked up. Sometimes more, sometimes less. Puts his teeth on my hand when he is uneasy, sometimes running them up & down my hand/wrist, but never biting, light as a feather. Sort of scary, tho. However, he is making forward progress, from a terrified feral, who first showed his interest in contact by throwing himself down facing away from me when he wanted to petted, to rubbing us, laying by the couch, following me from room to room, now sleeping on my side of the bed (when no one is in it), all kinds of little I accept you signs. Look for them. Let them happen. You haven't had him long. As long as he isn't feral agressive with you, I wouldn't worry.