I just picked my cat up and it's weird, there's this very obvious sort
of "pulsing" going on all through the middle of his body, heart to
stomach, as if he's breathing really hard but he's not breathing very
hard at all. I put him down and he's still doing it. He wasn't running
around or anything and I've never seen him do this. It makes the sides
of his body puff in and out, and it's very hard like his heart is
beating extremely hard. It's really weird, any idea what it is? He
seems fine, his behavior hasn't changed. He is almost two.