My cat has a rather funny problem. He has a sinus problem of sorts, so he whistles and snorts and grunts whenever he breathes. The vet says he's fine, but it gets really annoying. Especially when he sleeps on my bed at night. I have to try and sleep through a cacaphony of snorts, grunts, wheezes, and whistles. What a goofy cat. I love him, but he's odd.