by Brooke Van Dyk   Are you addicted to running, even when it’s hot enough to cook an egg on the sidewalk? Do you power through the heat while you power-walk, regardless of how sweaty you get? Or are you simply looking out for your cat or dog, making sure that they get all the exercise they need? No matter what your reasons, summer exercise is an important tool for keeping you -- and your pets -- happy and healthy. But it’s important to consider the effects that all that sunshine can have on your pooch. Heatstroke in pets can be a serious issue, causing damage to your cat or dog’s health. All pets can suffer from overheating and dehydration....