At that age, he should be more than ready to eat, but I don't think it's a concern yet. I find that my corns eat better in the early evening. At a month and a half, you should probably disturb him as little as possible. Are you feeding live or f/t? Do you still have the deli cup he came in? If you do, I would put the pinky in the deli cup, followed by the snake, put the lid on and leave him for an hour or so. The handling should be kept to a minimum. Right from the cage, into the deli cup. At this age, they get flighty really easy and become stressed. Stress is what you need to avoid. If this doesn't work, you might want to try braining a pink a couple of days later.