My lemonblast, Belle, was 107 grams as of 12/29/18 which was up from 71 grams on 10/29/18. She is a July 2018 hatchling and was difficult to start, even on live prey. Even though she is noticeably smaller than the other 2018 hatchlings I purchased this year, she is healthy and growing. As long as yours is eating regularly and husbandry is on point, he will grow. And yes, it is possible that he could still be hungry, especially if the paper still had rodent scent on it. Some will eat more than one prey item, so you could try thawing two hoppers for one meal rather than throw them out.