I am going to discuss this with my vet in the near future, but I figured I would post it here seeing how there is so much knowledge here =) My 6 mo. golden retriever seems to pant excessively. I live in Michigan, so it is cold here right now, and as soon as she starts to play she pants a LOT, and drinks quite a bit of water. When she is laying around she breathes fairly quickly as well. While she is laying here resting next to me it appears her lungs are filling about once every second, maybe a little faster. I will time it with a stop watch if need be. I understand that dogs pant when they are warm, or exerting quite a bit of energy, but it seems to be a lot for a puppy that I would think would have quite a bit of energy. The 8 month old black lab she is playing with is not breathing heavily at all, nor is it panting.. Any comments?