Final regulations to implement ACA provisions, issued in 2013 by the US Department of Labor (DOL), said health-contingent wellness programs can vary group health plan premiums or cost sharing based on health status and will not be considered to discriminate based on health status if they meet five standards.
It's only a partial answer, but a Nile crocodile can eat up to half its body weight at a sitting, according to National Geographic. Since few freshwater fish weigh half as much as a crocodile, we can probably assume these croc feasts occur when they're able to ambush ungulates (e.g. zebras and antelope).
What Do Leopard Geckos Eat. Leopard geckos are insectivores, which means they only eat insects. This makes them easy to feed, but you still need to follow a diet to make sure they stay healthy. This page will go over how to feed your leopard gecko and make sure their diet is healthy and nutritious.