As a feline practitioner, I have heard many stories and have seen my share of cats who, during the normal course of their day, happen to sit around with their tongues sticking out a little. In most cases, there is nothing to be concerned about. It is simply the cats own personal quirk, and it is actually kind of endearing.
According to the American Society for the Prevention of Cruelty to Animals, well over 86 million cats currently live in U.S. homes. Two-thirds of them, the organization estimates, are indoor-only feline companions - their owners keep them confined within the home at all times. The remaining one-third are so-called indoor-outdoor cats -they are free to trot in and out of their owners houses as the mood strikes them.
Letters to Tufts Veterinarians - Feeding a probiotic; Senior cat stops using litter box; A cat with puffy eyelids