My bp's and corn eat once a week and my boa every other week. The boa is 6' and eating large rats. My bp's are on rat pups but they eat 2 per feeding and my corn eats 2 hoppers per feeding. My normal ball went on a 3 month fast but it was around Autumn even though we don't really have any weather changes during fall in Florida. I'm pretty sure they don't know what the weather outside is because the temps and humidity stay the same year round. I don't have any experience with dumerils so I can't really help with them but it sounds like a husbandry issue