Eating Live Without Consdtriction?

Yesterday I fed my month and a half old corn a live pinky. I thought he would constrict it first then eat it. Instread he bit the mouse the ate it live. The mouse was still fighting back while the snake was trying to eat it. Is this normal? And one more thing. When the snake and mouse were touching (not being eaten), I could've sworn that the mouse had what I thought was a seizure. Is that normal too?

I've witnessed many hatchling corns eat live pinkies without constricting them first. I guess that after a few meals, they realize that a pinkie really can't fight back and that there is no need to waste time constricting it first. Once your corn moves onto larger, more potentially dangerous prey, you'll notice it constricting every meal...that is, unless you move it onto F/T. Then it may never constrict again. Some snakes learn that F/T doesn't need constricting. Others may or may not constrict, and then there are some that always constrict.

I"ve never really noticed seizure-like movements in pinkies or any other live prey item, but then again, I never really paid much attention to it. Most of my snakes, when fed the occasional live prey, either bite and constrict immediately, or avoid the prey until I've closed their cage and moved on to other snakes (shy eaters). The seizure may have actually been one, or a "terror" response to impending doom.

I have fed my baby corns a few live pinkys and one of them never constricts and the other one alwayse constricts. and when they start swolloing the pinky is alwayse still moving.
The siezure might have been shivvering from being cold, even if where your feeding your snake is warm, its differnt than being huddled in a group of ten with a mon that often comes to warm you up.

my snake never used to constrict pinkys or fluffs, i jus put it down to stupidity (lol), then she ate her first adult mouse..... "omg she is a killing machine" she was constricting for ages until he decided it was dead lol