3 feeds a week is a little much.. Try feeding either 2 large mice once a week or one small/medium rat. All that feeding and handling can cause improper digestion.

Heres a scary thought.. If a snake is handled after feeding it can cause improper digestion and possibly regurgitation. If the snake doesnt have a warm enough area to lay while digesting, the food can actually begin to rot inside the snake and kill the snake.

I would go with a once a week feeding and try to feed something a bit bigger. A rodent closer to the size of the widest part of the snakes body.