Dog Bite | Animal Behavior Expert Witness For Attorneys

Richard H. Polsky, PhD, CDBC
Los Angeles, California

“Bringing the science of animal behavior to attorneys”


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Animal behavior expert opinion in a California dog bite lawsuit

Animal behavior expert opinion is frequently needed  in California dog bite lawsuits.  Common dog bite issues in California in which Animal behavior expertthe animal behavior expert may be called upon to opine deal with provocation, negligence, foreseeability and an  animal behavior basis to support a claim for punitive damages.

In this article, I will summarize the fact pattern of a California dog bite lawsuit in which the plaintiff, an exterminator, was viciously attacked by a pit bull.   I served as the animal behavior expert for the plaintiff and I believe partially through my deposition testimony  the lawsuit settled very favorably for the plaintiff  shortly before trial.   An interesting part of the case was that the plaintiff  made a claim for punitive damages because there was substantial animal behavior bases to support this claim, as explained below.

Fact pattern of this California dog bite lawsuit

The plaintiff, an exterminator, was on the defendant’s property the spray the outside of the house.  he had been doing this work for the defendant/dog owner for several years.   And because of his previous visits on a bimonthly basis he knew of the presence of the owner’s pit bull.   During his visits arrangements are made  with the owner  to  confine her pit bull, named Bruno, in the house so he could spray the backyard.  On the day of the incident, the owner may not have been home and  her pit but was left in the backyard. There was dispute about whether she was present.   Regardless of her presence, the gate to the backyard was in disrepair and secured by with a single zip tie.  The incident happened when the plaintiff was spraying  the side of the house  adjacent to the backyard. The pit bull broke through the gate and  viciously attacked him, a 40-year-old man in good physical condition.   The plaintiff stopped the attack by spraying the dog in the face with his hose and then jumped up on a nearby wall to escape.  The pit bull  quickly recovered and started jumping and barking at the plaintiff who positioned himself on top of the wall for safety.   He immediately called 911, the police arrived shortly thereafter, and  killed the dog with the gun.  This incident  happened in central California in a rural area near Modesto.

Discovery which supported the foreseeability of the incident and the claim for punitive damages

The defendant’s deposition testimony was very favorable for the plaintiffs.  First,  she testified that Bruno would act aggressively towards unfamiliar people who came near her property and that she kept Bruno as a security dog.  She believed pit bulls were naturally aggressive.   She failed to neuter and train the dog despite the fact that many of her previous dogs were well trained and neutered.

She also testified that Bruno would probably attack a person for protection purposes because of his nature and that he would aggressively bark at anyone who came near the property.  She felt that Bruno was extremely muscular, powerful and very intimidating.  Bruno was an outside dog so he was kept in the backyard most of day and night.

Moreover, she testified that the backyard gate was in a state of  disrepair  but she did not have time to fix it so she temporarily kept it shut with  a plastic zip tie.

Animal behavior expert opinion and analysis 

  • The  plaintiff was attacked because of Bruno’s strong territorial reactivity. The defendant knew of  Bruno’s territorial nature and dislike of unfamiliar people who approach the property and therefore the incident should have clearly been foreseeable to her.
  •  Despite her knowledge of  Bruno’s aggressive nature, she failed to either train or neuter Bruno.  She was negligent in this regard because these interventions may have a strong likelihood of reducing aggressive tendencies in male dogs. The defendant undertook these  interventions with all of her  previous dogs but not Bruno.
  • The defendant acted in a reckless manner with respect to the manner in which she secured Bruno in her backyard. The gate was in a state of disrepair.   In the least it should have been secured with a padlock and not with a zip tie.   Given this, it should have been foreseeable to her that when a stranger approached the backyard Bruno would bark and banged against the gate which in turn would cause it to open because it was not properly secured.

There are other aspects to this case which I will not go into the sake of brevity.  The above  was sufficient animal behavior evidence to  conclusively conclude that the defendant through her negligent actions compromised public safety thereby placing the plaintiff in harm’s way. I have rarely seen such clear-cut evidence to support a claim for punitive damages as in animal behavior expert witness.  I direct the reader to attorney Ken Phillip’s  comprehensive website for  a legal perspective on punitive damages in California dog bite lawsuits.

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Animal behavior expert, Richard Polsky PhD, has testified in over 300 dog bite cases in California and other states throughout the USA and Canada.  He will consider assignments  as an expert witness from  personal injury attorneys involved in dog bite litigation.