Sibling Rivalry explored
SIBLING RIVALRY
Sibling rivalry is the term used to describe situations in, which 2 dogs (siblings or not), living in the same household fight repeatedly. These fights may start out with snarling and growling, but usually progress to vicious, prolonged fights if steps are not taken to correct the problem. The dogs are usually both males, and many are littermates.
The fighting occurs because the dogs are not allowed to establish a dominance hierarchy or “pecking order”. In the wild, an individual dog occupies a strictly defined position within the pack. No 2 dogs share the same level of dominance, so in any confrontation the more submissive pack member will defer to the more dominant one. Some dogs have a strong drive to establish dominance, and will constantly challenge more dominant animals to fight. The winner of the fight moves up the dominance ladder with respect to the loser. Very dominant dogs do not fight with very submissive dogs, because the submissive animal defer to them. Fights only occur between dogs of nearly equal dominance.
Fighting often starts in situations in the wild dog pack; the social status would normally change. For example, fighting may begin when a younger dog reaches puberty, and his drive for dominance is activated. Problems may also occur when an older pet gets sick, and is unable to maintain his position with respect to the younger animal.
Problems arise in human households when the family pets are not allowed to establish a dominance hierarchy. This occurs because the human members of the family intervene by punishing the winner (the dog who should be dominant) and comforting the loser. Unfortunately, in doing so, the submissive dog’s social status is elevated, and that of the dominant dog is lowered. The dog’s dominance levels remain nearly equal, ensuring that fighting to establish a stable dominance hierarchy continues. The fighting will only end when a social order is established, with one dog clearly dominant and the other one submissive.
The fights are usually triggered by competition for something the dominant dog takes as his right, but which the other dog refuses to give up. Many dogs coexist happily until the owner comes home, but then fight for the owner’s attention. Often, the owner’s presence makes the submissive dog more confident and willing to challenge the other dog’s position. The dogs may also fight over valued resources like food, toys or sleeping area.
Treatment of sibling rivalry: You should discuss your pets’ specific history with your veterinarian before attempting any treatment, as some interventions can cause some pets to exhibit worse behavior if the cause is misdiagnosed and/or your pets’ responces are not monitored. This could include your pet reacting in an unexpected manner and causing serious physical damage to you, your family, or other pets. The following information is of general nature only to inform pet owners how some cases are treated.
Do not follow any of the suggestions below without a specific behavioral diagnosis and behavioral modification “prescription” from your family veterinarian!
The 1st step in treating sibling rivalry is to determine which of the dogs is dominant. This decision should be based on the age, sex, size, health, tenacity, and behavior of the dogs. Young puppies are seldom dominant, but may challenge an older dog for dominance when they reach puberty. Often the dog that is consistently the aggressor is more dominant.
Because the fighting can be serious, it is important not to stimulate aggression between the dogs. For this reason, toys and food should be removed. One may leave the dogs alone together while they are away, because without food, toys, or your presence, there is little to stimulate fighting. If the dogs do fight in one’s presence one must reassure the aggressor and reprimand (or do “time out”) the submissive dog. One’s praise (of the naturally dominant dog) will make the dog more dominant, which will contribute to the rapid establishment of a stable social structure.
**It is vitally important that the dogs both recognize the human members of the family as dominant members of their pack. If a pet owner has trouble with either of the dogs growling or snapping at them, resisting grooming or nail trimming, or other signs of dominance, these problems will have to be treated before one attempts to establish a dominance hierarchy for the dogs.
Once a pet owner has determined which dog will be dominant, everything the owner does should reinforce that animal’s status. The dominant dog should be fed, exercised, praised and given attention before the other dog. Initially, it may be wise to ignore the submissive animal, while paying a great deal of attention to the other dog, until the dominant animal is secure with his status. If this causes aggression, one may try caging or tying up the submissive dog so that people can interact freely with the dominant dog, in front of the submissive dog, without causing a fight. One must continue to recognize the dominance status, once it has been established, by always dealing with the dominant dog 1st.
A pet owner should set up situations in that the person pets and praises the dominant dog, and allows the submissive dog to watch from a safe distance. It may be necessary to start dominance training in the park or some other neutral territory. Once dominance has been established on neutral territory, one can repeat the training at home.
Castration of both dogs is rarely helpful, but neutering only one dog is useless. If the above training is not successful, it is possible for one’s veterinarian to prescribe a temporary course of medication for the submissive and/or dominant dog. This may alter the relationship between the dogs enough to make dominance training proceed more smoothly.
We realize that it is extremely distressing to have dogfights in ones’ home. However, sibling rivalry is one of the easier problems to solve if caught very early, once one realizes that dogs do not expect to live as equals, and that both dogs will be happier and more secure with a stable social order. We are here to help pet owners in whatever way we can. Working together, we are sure we can treat this unwanted behavior and that people and their pets dogs will have many problem- free years together.
This information is provided with permission by the courtesy of Dr N. Dodman, Tufts University and Drs D. McKeown & U. Leuscher, Ontario Veterinary College, Canada.

