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Article
Effect of dietary protein content and tryptophan supplementation on dominance aggression, territorial aggression, and hyperactivity in dogs.

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Article
A case series of biting dogs: characteristics of the dogs, their behaviour, and their victims.

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The characteristics of 227 biting dogs, their homes, and their victims were gathered in a detailed telephone survey of general veterinary clientele in the Canadian provinces of New Brunswick, Nova Scotia, and Prince Edward Island. All of the dogs had bitten either someone living in the same household, or someone who was a frequent visitor and was well known to the dog. There were 117 male and 110 female dogs included in this case series. Significantly more female dogs were neutered (P=0.03), 58% of the dogs were purebred, and the most commonly reported breed was the Labrador Retriever (n=15). The mean number of people living in each home was 3.13 (S.D.±0.08). Aggression which would traditionally be defined as dominant or possessive had been demonstrated by 75.6% of the dogs in at least one of 17 specific situations outlined in the questionnaire. Dogs with a history of this type of aggression were significantly older (P=0.02) and of lower body weight (P<0.001) when compared to the remainder of the dogs, and were more likely to be fearful of a variety of stimuli. The effect of fear in these dogs may be important in understanding the motivation for and treatment of aggression problems. For what the owner considered to be the worst bite incident, 42.4% could be attributed to behaviour which appeared to be characteristic of dominant or possessive aggression. If the reason for the worst bite incident was related to the commonly accepted criteria for dominance aggression, then the dogs were more often male and purebred. Owners of these dogs were also more likely to rank the bite as a more serious event (P=0.001). Adults were the most common victims of dog bites, and most injuries were to the hands and arms (56.2%). A minority of injuries (9.3%) received medical attention, supporting previous evidence that dog bites are greatly underreported. A bite requiring medical attention was scored as a more important incident by the owner and was more likely to have caused the ow


Article
Natural animal models of human psychiatric conditions: assessment of mechanism and validity.
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Year: 2000

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1. 1. The classic animal models for human psychiatric conditions involves rodents As prey species, their normal behaviors of avoidance would be considered pathological in humans and dogs. Hence, such models may not be homologous for similar behaviors found in psychiatric pathology in humans. 2. 2. Dogs exhibit pathological behavioral conditions that may be equivalent to certain human psychiatric conditions. These canine conditions appear spontaneously or endogenously in the absence of genetic or neurochemcial manipulation, and as such, may be homologous to the human condition. 3. 3. If canine conditions approach homology with human conditions they should have excellent face, predictive, and construct validity. 4. 4. The canine conditions of separation anxiety, obsessive-compulsive disorder, cognitive dysfunction, dominance aggression, and panic disorder have good to excellent validity at all explored levels for human generalized anxiety disorder, obsessive-compulsive disorder, Alzheimer's disease, impulse control disorders, and panic disorder. 5. 5. Natural canine models can aid our understanding of human psychiatric conditions.

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