What animals do not chew their cud?

Animals that do not chew their cud are typically non-ruminants, which include species such as pigs, horses, and humans. Unlike ruminants like cows and sheep, these animals have a simpler digestive system and do not have a specialized stomach compartment for fermenting food. Instead, they digest food in a single-chambered stomach, processing it without the cud-chewing behavior seen in ruminants. Other examples include carnivorous animals, such as cats and dogs, which also do not chew cud as their diet is primarily meat-based.