Regular training You'll need to establish leadership and teach your dog skills that will help you control his jealousy, which can be accomplished by consistent training. If you speak to your dog in a firm, serious and authoritative manner without shouting, he will be forced to listen to you and obey you. Eliminating the reward Another way to treat your dog’s jealousy is to remove the reward. The reward can be anything: a treat, a walk to their favorite park or you yourself. Make sure to ignore your dog’s jealous behavior and simply don’t reward them for that. Involving the reason for jealousy in regular training If your dog is expressing jealousy toward a certain thing or person, include them or the object in the training process. Including them may entail taking them on walks with that person or requiring that person to give your dog their favorite goodies and lavish affection on them. Improve the relationship between your pets If your dog is envious of your new pet, you should teach him that living peacefully together is the most rewarding behavior. Take both pets on walks together, give them goodies and spend quality time with them all together to help your pets bond better. Fostering a relationship between your baby and your dog When your dog appears to be jealous of a new infant in the family, encourage him to interact with the newborn in a regulated manner. Controlling aggression Territorial behavior in dogs is common, but it becomes abnormal when it becomes aggressive, this behavior is treated by rewarding and praising calm conduct, obedience training, removing triggers, making certain changes, and making it difficult for him to behave in a particular way.