Is Bubbles the one in the first picture? His appetite might not be in full drive yet because his tail has not fully absorbed. Once it does, I agree with Paul: he will be seeking out food and eating whenever he gets the chance. I have an American Bullfrog tadpole who has just had his front legs pop and I am on alert for his appetite to increase the smaller his tail gets. Right now, he hasn't taken crickets, but I can't wait for him to start.