Nobody is sure why dogs sleep so much. The amount of sleep that an animal needs depends upon its species. Horses and cows may sleep only three or four hours daily, because they require long hours of grazing to supply their bodies with sufficient food. Bats and opossums may sleep closer to 20 hours. The various breeds of dogs also seem to have different sleep requirements. Some very large breeds of dogs, like Newfoundlands, Saint Bernards, and mastiffs, often spend a great deal of their lives sleeping â perhaps up to sixteen or even eighteen hours a day.
When it comes to eating before exercise, it's all about timing. No matter what time of day you choose to exercise, make sure to plan your workout two to three hours after your meal. Going overboard with too much food right before a workout will leave you feeling sluggish and can lead to stomach discomfort.
If you exercise in the morning, get up early enough to finish breakfast at least one hour before your workout. Most of the energy you got from dinner the previous night is used up by morning, and your blood sugar might be low. If you don't eat, you might feel sluggish or lightheaded when you exercise.e careful not to overdo it when it comes to how much you eat before exercise. The general guideline: 1  Large meals. 2  Eat these at least three to four hours before exercising. 3  Small meals. 4  Eat these two to three hours before exercising. 5  Small snacks.