What are you feeding? F/T?

If so...

I had the same issue with my albino. He was fine for months on F/T and then would start to strike and constrict, but never eat...

I find that if I wiggle the mouse/rat once he bites, he will constrict more and finally eat the F/T rodent. I think he thinks he's doing the killing and the food becomes more appetizing. Good luck