The speed at which an old dog accepts a new dog varies from dog to dog. It mainly depends on whether the two dogs have a friendly personality, whether the sense of territory is strong, and whether the owner’s guidance is correct. If they are two dogs with better temperaments, Dogs may be friendly to you as soon as you enter your home. Generally speaking, old dogs are reluctant to accept new dogs. This is mostly because the old dog has a strong sense of exclusivity and is jealous that the new dog has taken away the owner's attention. At this time, the owner needs to pay attention to the balance and not touch and care too much in front of the old dog. Reward the new dog until the old dog thinks that the new dog will not pose a threat, then it will slowly let down its guard and gradually accept the new member.