Why can’t cats chew and grind food like humans do?

Cats are highly specialized, strict flesh-eating mammals whose anatomy is adapted for a carnivorous diet rather than the grinding and chewing seen in humans.1

The primary reasons cats do not chew or grind their food include:

• Lack of specialized teeth: Unlike humans, who possess flat-crowned molars and premolars designed for crushing and grinding, cats lack these structures. Their teeth are adapted specifically for stabbing, anchoring, and cutting. They utilize sharp carnassial molars to slice meat into smaller pieces.12
• Restricted jaw movement: The masseter muscles in a cat, which control the lower jaw, are very strong but restrict lateral (side-to-side) movement. Because their jaw movement is primarily vertical, they are physically unable to perform the grinding motions required to break down food as humans do.13
• Digestive adaptation: Because they are obligate carnivores, cats do not need to grind food to expose tough fibers to salivary enzymes in the mouth. Instead, they cut meat into chunks that are swallowed relatively unchewed and subsequently broken down by powerful enzymes and acids within their digestive tract.13