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).
Camels eat a wide variety of plants over expansive home ranges. They have leathery mouths and can eat practically any vegetation including thorns, dry vegetation and salt bush that other mammals avoid. Just about all vegetation available in the desert. They also store food in their humps for up to 6 months, as fat.