Beautiful Male Australian Shepherd

We have a beautiful 1 1/2 year old red merle male Australian Shepherd. He is great with kids but is best kept as the only dog as he is agressive with other dogs. Great with people, and children. He would make a great herding or farm dog(with training) as he has high energy. Very beautiful would make a great stud dog. He has had his first shots and has been dewormed. Life is just to hectic with school and I don't have enough time for him.