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).
The common wild toad has much the same diet the world over. There are a few species of toads that will eat dead animals and even dog or cat food, but for the most part they eat living animals. Depending on the size of the toad the food they will eat varies. To see what small toads eat see the post entitled what do small toads eat. Most wild toads will eat everything from small spiders to large rats. This includes birds, worms, ants, lizards, slugs, snails, butterflies, crickets, centipedes, most invertebrates, and even other frogs and toads.