Clinical Ethology and canine aggression in Montevideo: implications of race and gender

Statistics about clinical data is lacking in Uruguay. Herein, we present an account of canine behavioral problems recorded from different sources: a) clinical reports on canine behaviour, from 30 veterinary clinics in Montevideo city from 2005 to 2007 (n = 179); b) records of dog attacks to people (n = 992) reported at the Servicio de Atención al Mordido (Ministerio de Salud Pública, same period); and c) conflicts from records of Comisión Nacional Honoraria de Zoonosis (n = 44,000). Based on these data we discus common behavioral problems, types of aggression involved, the frequency of male / female, if they were neutered or not and the age at the onset of the first episodes of aggression. For each record we obtained an aggressive risk factor associated to breed. The results are consistent with international reports, where the aggression was the most common behavioral problem (58.9%), and dominance aggression has the highest proportion (56%). The RDPCC records revealed that the proportion of animals involved in aggression is similar in both genders. However, SAM-MSP records showed that males (71%) were a significantly greater proportion than females (29%). Our data from RDPCC showed that 100% of males involved in aggression towards people were whole, while 38.5% females were castrated. The first signs of canine aggression towards people were observed in first year of life in 56.5% of cases. On the other hand, while the RDPCC record suggests that Cocker breed tended to show more attacks of aggression toward people, the SAM-MSP record pointed to the German Shepher as the more aggressive breed. The Rottweiler and Uruguayan Cimarron, occupied the first and third place respectively in the aggressive risk factor rank associated to breed, both in RDPCC and SAM-MSP set of records. This is the first descriptive work on dog behavior problems and aggression in Montevideo, where also is shows the implication of the Cimarron uruguayo race in aggression.