I haven't seen anything like this. I took Charlie for a walk to the dog park, and of course he had a great time in the park zooming around. Walking back, he took his sweet time, all of the sudden he just collapse, laid down on the ground....panting for breath, would not bulge. He was poofed, exhausted... I had to carry him all the way back home which is only half a block. Now he is napping, I checked, nothings wrong with him. /forums/images/%%GRAEMLIN_URL%%/sleep.gif