Canine Gastric Dilatation-Volvulus (Bloat) 

School of Veterinary Medicine  Purdue University, West Lafayette, IN 47907-1243

Non-dietary risk factors for gastric dilatation-volvulus in large and giant breed dogs

Lawrence T. Glickman, VMD, DrPH; Nita W. Glickman, MS, MPH; Diana B. Schellenberg, MS; 
Malathi Raghavan, DVM, MS; Tana Lee, BA

Summary of findings (references 1 & 2) -A 5-year prospective study was conducted to determine the incidence and non-dietary risk factors for gastric dilatation-volvulus (GDV) in 11 large- and giant-breed dogs and to assess current recommendations to prevent GDV. During the study, 21 (2.4%) and 20 (2.7%) of the large and giant breed dogs, respectively, had at least 1 episode of GDV per year of observation and 29.6% of these dogs died. Increasing age, increasing thorax depth/width ratio, having a first degree relative with a history of GDV, a faster speed of eating, and using a raised feed bowl, were associated with an increased incidence of GDV. Table 1 summarizes the magnitude and direction of GDV risk associated with having each of these factors. The relative risk (RR) indicates the likelihood of developing the disease in the exposed group (risk factor present) relative to those who are not exposed (risk factor absent). For example, a dog with a first degree relative with a history of GDV is 1.63 times (63%) more likely to develop GDV than a dog without a history of GDV. As another example, if dog ‘A’ is a year older than dog ‘B’, then dog ‘A’ is 1.20 times (20%) more likely to develop GDV than dog ‘B’. 

Most of the popular methods currently recommended to prevent GDV did not appear to be effective, and one of these, raising the feed bowl, may actually be detrimental in the breeds studied.In order to decrease the incidence of GDV, we suggest that dogs having a first degree relative with a history of GDV should not be bred.Prophylactic gastropexy appears indicated for breeds at the highest risk of GDV, such as the Great Dane. 

References:

1. Lawrence T. Glickman, VMD, DrPH; Nita W. Glickman, MS, MPH; Diana B. Schellenberg, MS; Malathi Raghavan, DVM, MS; Tana Lee, BA. Incidence of and breed-related risk factors for gastric dilatation-volvulus in dogs.Journal of the American Veterinary Medical Association, 2000;216(1):40-45. 

2. Lawrence T. Glickman, VMD, DrPH; Nita W. Glickman, MS, MPH; Diana B. Schellenberg, MS; Malathi Raghavan, DVM, MS; Tana Lee, BA. Non-dietary risk factors for gastric dilatation-volvulus in large and giant breed dogs. Journal of the American Veterinary Medical Association, 2000;217(10):1492-1499. 

Reproduced with permission from Purdue University Epidemiology Department

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