Family and Dogs Puzzle :

                   Consider there are five families and their five dogs (each family member owned one of the dogs) were hiking when they encountered a river to cross. They rented a boat which could hold three living things people or dogs. Unfortunately, the dogs were tempermental: each was comfortable only with its owner and could not be near another (not even momentarily) unless its owner was present. Dogs could be with other dogs however. The crossing would have been impossible except that Lisa’s dog had attended a first-rate obedience school and knew how ro operate the boat. No other dogs were that well-educated. How was the crossing arranged and how many trips did it take?

Answer :
                 Solution is somewhat similar to River puzzle which is already present in this blog. Try to find and  Comment your answers...