My yellow belly boy hasn't eaten since the beginning of Dec. I just keep trying. It's the bp breeding season and boys are looking for girls. Just like teen boys always look for girls. I'm about to go on a 2 wk feeding try on him because he's not interested in food. Its normal unless they start loose a significant amount of weight, and look in really bad body condition. Mine was around 470 something and now he's around 450 something. I weigh once a week right before I feed. That way its empty weight not full weight.