A more rare vocalization of cats is a trill, sound somewhere between a meow and a purr. Cats use it as a friendly greeting to people or other cats. However cats can also use it when they see something they like, for example, treats.

Cat trills are also how mother cats get their kittens to pay attention or follow them.

The amount of cat trilling varies with personality. Some cats are shy or apprehensive so they do not trill.