When you gain a pound of fat, your body makes seven new miles of blood vessels. This means your body must work harder to pump blood through all of these extra new vessels, which may put a strain on your heart, and may reduce oxygenation and nutrient replenishment in other tissues.
Panting is a sign that your dog is excited, hot, or both. But panting is also a warning sign. If your dog is taking a break from exercise and continues to pant heavily, this could be a sign of heatstroke â a medical emergency. Move your dog to a cool spot or indoors immediately.
Panting or breathing heavily and rapidly in a pregnant dog is a sign that labor contractions have begun. Dogs normally pant when in pain. (See Reference 2) Pregnant dogs in labor will also lick their vulvas and try to find a dark, quiet spot to whelp (give birth.) (See Reference 1).ogs can take up to two hours in between whelping puppies in the same litter. If a dog actively goes into labor with panting and then is too exhausted to continue, she may have uterine inertia and needs veterinary assistance immediately. (See Reference 4).