Thank you for pictures, a puppy is adorable but there is now something about an older dog Hope this can help you; Yes, if your dog is grown up - It will typically say 1-1½ years old - is it a great training partner. Only very small, very heavy and very large dogs are not physically fit to run long trips. Small dog breeds like Shelties must run 5-7 km (3-4 miles) However, as in humans, the shape of the dog must be gradually expanded. If you have run for many years, it is important that the dog is allowed to run only with some of the road in the first time. Dogs may also suffer from overload damage. The dog must not be trained more than it wants. If it slows down, sits down or stops along the way, it is because it requires a break. Do not run faster than your dog can drive next to you. Trot is the dog's long distance technique. Build for example. The shape of the dog starts at the beginning 1 minute and goes 2 minutes. Go gradually up to 3 minutes and 1 minute walk - and finally the dog is in shape to run all the way.