Something else you might want to consider is that since he is taking F/T, he may have adjusted his feeding response. Since he knows it is dead, why should he use excess energy in a stalk/strike/coil? He can eat it at his leisure, when he feels safest, like in the middle of the night when no one is watching. Sucks for the keeper, since we all like to watch them eat, but I'd say it speaks well of him making the adjustment to F/T. Just a thought.