I have a puppy and its breed is bred to run/exercise 3-4 hours at a time. My dog is only a puppy. He is 14 weeks, and I take him out for walks daily. We walk about 400 meters from my place over to the Starbucks. He does fine and walks next to me fairly easily. A few days I decided to run him on my bike. Same distance. He was easily keeping pace and at time would actually run ahead. Mind you we weren't going that fast. About the speed of a fast run or jog. I am too lazy to run, so I ride my bike. When we got there he didn't seem winded or anything. I decided to try this pace for the next 3 days and he has been fine every time. He goes faster and faster each time and we get there sooner and sooner. I don't want to run him more than this because he is so young and is still developing. For now we walk there in the morning, and bike there in the afternoon. I wanted to know at what age do you usually take your dogs on longer walks. Some other dogs of his breed are out 3-4 hours a day at a year old. I don't want to rush home into it, but I am assuming there will be a stage withing the next 6 months where he will just be able to run for hours. I just want to make sure I don't rush him there too early.