We stopped feeding our spadefoot tadpole the lettuce when it sprouted all limbs and started slowly absorbing its tail. The tail is now just about to disappear, I would say it is more than halfway gone. I also noticed that the little guy seems a bit more sedentary than usual, and likes to stay out of the water and position itself between rocks and little corners, as if it wants to hide. I want to make sure that it isn't starving or getting sick. When should I start feeding him again? This time with protein?