no they dont chew but they may give the impression of chewing as they try to let you go and get there teeth unhooked. I speak from experience

Snake hooks you need to be careful with especially a big fat heavy blood adult as you can damage them if not careful. I personally dont use snake hooks on my larger bloods preferring to just lift and pull them out carefully.

Never tap any snake on the head imo Bloods especially dont like you messing with the head or tail, and never panic if you do get tagged they will in general try and let go right after but it can be like getting a fish hook out when they get a good hold.