feeder rats big enough to bite

[redfeather2006]

Rocky is now eating medium to large rats, which is causing a dillema. He absolutely will NOT eat frozen (believe me i've tried), but there have been a coupel of times where he will very quickly strike and constrict the rat, but the rat bites him! once he got a bite that left a dime-sized hole in him. It healed up just fine, but what if next time it doesn't heal so well?

Does anyone ahve any advice on what I can do to "stun" the feeder rat before handing it over to Rocky? I was told by the reptile store employees to grab the rat by the tail and slam it's head on a hard surface. I've been trying that but it doesn't seem to help much. So...any advice?