I’m starting to train for my first marathon in December. My dog is a 3 year-old 28 lb. terrier/beagle mix and is very energetic and loves to run and play. The program calls for a gradual increase in milage and time each week (with a three week taper) until Dec. 9, which lets the body adjust and prevents injury. In a few weeks we’ll just be jogging 30 minutes a day, which I know she can do. However, by November, I’ll have worked my way up to running 36 miles a week, and my long run will be 18 miles. Is this too much for my dog, even if she has trained with me all along? Maybe I should take her for he shorter leave her home for the long runs? I would love advice from experienced runners who take their dogs. Thanks.