Why does a cat have a bad tongue? - briefly
A cat's tongue has tiny, backward-facing barbs called papillae, which help with grooming but can feel rough or "bad" when licking.
Why does a cat have a bad tongue? - in detail
The texture of a cat’s tongue is often described as rough or "bad" due to its unique structure, which serves several essential functions. A cat’s tongue is covered with tiny, backward-facing spines called papillae, made of keratin, the same protein found in human nails. These papillae give the tongue its sandpaper-like feel and are highly effective for grooming. When a cat licks its fur, the papillae help remove dirt, debris, and loose hair, while also distributing natural oils across the coat to keep it clean and healthy. This grooming behavior is not only hygienic but also helps regulate body temperature and maintain skin health. Additionally, the rough texture of the tongue aids in feeding. Cats are obligate carnivores, and their tongues help them scrape meat off bones and efficiently lap up water. The papillae act like a comb, allowing cats to separate edible parts from inedible ones. While the roughness of a cat’s tongue may seem unusual or unpleasant to humans, it is a highly specialized adaptation that supports their survival, grooming, and feeding habits. This unique feature is a testament to the evolutionary refinement of feline anatomy, ensuring cats remain efficient hunters and meticulous self-groomers.