New or worsening aggressive behavior in older dogs may result from undiagnosed pain. In a study published in the Journal of Veterinary Behavior, researchers studied dogs whose owners complained of new or worsened aggressive behaviors. [1]
In all cases, pain had been building for some time. Dogs became aggressive when people tried to move their food, when the dogs were moved, or when they were made to do something. Interestingly, the dogs who showed no history of aggression were more likely to act aggressive in response to being repositioned. Dogs with no prior history of aggression were less likely to give any warning (such as growling) before attacking. [2]
Here are some signs that pain is building in your dog:
If you suspect pain, consult a veterinarian. The pain could be a sign of a worsening condition, the course of which could be improved with timely intervention.
[1] Tomas Camps, Marta Amat, Valentina M. et al. Pain-related aggression in dogs: 12 clinical cases. Journal of Veterinary Behavior: Clinical Applications and Research, 2012; 7 (2): 99.
[2] Camps T., Amat M., Mariotti V.M., Le Brech S., Manteca X. Pain-related aggression in dogs: 12 clinical cases. J. Vet. Behav. 2012; 7:99–102. doi: 10.1016/j.jveb.2011.08.002.
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