Why is my dog jealous of the new dog? How can I stop the fighting?
Your house is a lot different, and your own dog may be feeling like there is a bit of an "intruder" situation going on. it may take some time for your dogs to all get along, especially if the change was recent. Until they get along better, the dogs should only be together when able to be supervised by you. You may also want to pick up items of contention such as beds, toys, treats, etc that may be fought over if your dogs feel threatened. If a fight breaks out, immediately separate the dogs for a "time out"/cooldown, and then reintroduce when all dogs are calm and relaxed. When you are not at home, the dogs should be separated or crated in separate crates to avoid a potential fight.
If the issue persists, speaking with a trainer or behaviorist may also help as they can often observe what is going on in the home, and can make suggestions based on your specific needs.
Updated on September 23rd, 2025