Have you ever tried taking him to a park or someplace that would really be fun for him to help give him the idea that walking is great fun? I've never seen one that didn't like to walk, either. In fact, if Kacee is outside and wants to go for a walk, she won't come in. She'll stand or sit there staring at me until I give in - she doesn't realize that we can't walk up the road until it's cooler because the pavement is too hot. So, we just walk around the yard at those times.