My new kitten, Simon, has a tendency to pant. I don't just mean when he's hot, and it's not always when he's been playing hard- although it lasts WAY longer when he's playing hard, and he won't STOP playing hard even when he's panting heavily. I know this is bad, so he's going to the vet as soon as I get paid, but I can't help but wonder what exactly this could mean. Cats aren't supposed to pant, right? and HOW can I stop him from playing crazily when he's already panting? He doesn't seem to be hurt by the panting, and he never collapses or anything... do some cats just pant?