All animal owners want their pet to be happy & healthy, but with cats it can be difficult to determine their happiness due to their very independent nature. Eyes & Ears Cat’s use their eyes to communicate. When they are happy and comfortable their eyes will start to dilate. If they slowly blink at you, it is a sign of affection as they are let you know they are happy. Their ears will also face forward with a slight tilt back. Vocals Cats are very vocal creatures, with their meow indicating to how they feel. A higher pitched meow is a happy & comfortable cat, whereas a lower pitch indicates they are annoyed or unhappy. Another positive indicator of happiness in your cat is the purring sound.