However, contrary to popular belief, all cats purr. Lets start with the cats' appearance. All cats also posses very lethal weapons in their mouth - their canine teeth, which are very large and sensitive to pressure. The canine teeth of cats are the most highly developed of all carnivores. And they also have the least number of teeth in their skull, due to the shortening of the skull.
Some cats have even less.
Cats need less teeth than other carnivores since they do not eat as much vegetation and thus do not have the need for the grinding teeth known as molars. Cats also have highly developed carnassial teeth, which are the shearing teeth hallmark of the order Carnivora. These teeth are located in the sides of the mouth and are used to shear apart meat into smaller pieces. In less developed carnivores, like weasels and bears, the carnassials are smaller and less powerful. To get the maximum effect, cats only use one side of their mouth when eating, to maximize leverage.