My axis are not as greedy as they used to be. They will turn away from a squirming second piece of earthworm. They are also not growing. They are about 3.5 months. They are about 3" and I try to feed them half a worm each everyday. They are down to quarter worm a day. Also my wild type loves to gulp air and is only content when he's had enough air to keep him floating at the surface. Water is all fine. Also, I feed the worms kale and Potato skin. What can I do?