How many furry friends does he need?
Your dog does not need to have a million friendship with other dogs, what he needs is a solid relationship with his leader. Spend time to walk with your dog, train your dog, and play with your dog. Let your dog run and play with other dogs may get him exhausted but other dogs are no substitute of you. To build a great relationship with your dog, you need to teach your dog to engage in you and desire your company more than anything else in the world so your dog will willingly choose to be with you no matter what.