My 5 year old male Kelpie suffers from what I think is exercise induced collapse. I've done some research on the WWW and he seems to be exhibiting most of the symptoms....although most of the sites talk about the condition being prevalent in Labs mostly. No matter how cold it may be, if he becomes over-active ie. chasing something with real gusto, he collapses as though he is to the point of exhaustion. It takes him anywhere from 15-30 mins to recover, depending on how 'hard' he's run. Forge