Volvulus To calculate your dog’s lifetime risk of GDV follow these steps


Canine Gastric Dilatation-Volvulus (Bloat) Scale


Volvulus (Bloat)




Based on the findings of the five-year prospective study of gastric dilatation-volvulus at Purdue University, graphs were drawn to help owners of large (50-99 lbs) and giant (>99 lbs) breed dogs estimate their dog’s lifetime risk of developing GDV. The risks were calculated assuming an average life span of 10 and 8 years for large and giant breed dogs, respectively.

To calculate your dog’s lifetime risk of GDV (bloat) follow the steps below:

1. Determine how many risk factors for GDV (bloat) your dog has according to its weight category. Score 1 point for each.


Risk Factors Large Dogs{50-99 lbs}Giant Dogs{>99 lbs}
High risk age group {if large & >5 years or if giant & >3 years}11
Deep and narrow chest compared with other dogs in the same breed11
Having any first degree relative with history of GDV11
Using a raised food bowl11
Being a faster eater compared with other dogs11


2. Add up your dog’s total risk score.

3. Use the appropriate graph below to determine your dog’s lifetime risk of GDV.

great dane picsExample 1: If your dog weighs 70 lbs, and has 3 of the known risk factors (7 years of age, a first degree relative with history of GDV, and is a fast eater compared with other dogs of the same breed) the total risk score would be 3. Using graph A, draw a vertical line from the horizontal axis at the point indicating 2 to 3 risk factors up to the point where it meets the line of the graph. From this point of intersection draw a line horizontally to the left until it intersects the vertical axis. The estimated lifetime risk of developing GDV for your dog is 24%.









great dane picsExample 2: If your dog weighs 110 lbs, and has 2 of the known risk factors (4 years old, a deep and narrow thorax compared with other dogs of the same breed) the total risk score would be 2. Using graph B, draw a vertical line from the horizontal axis at the point indicating a risk score of 2 to 3. At the point of intersection with the graph draw a line horizontally to the left until it intersects the vertical axis. The estimated lifetime risk of developing GDV for your dog is 28%. Using this method, you can determine how much your dog’s risk of GDV would be reduced if you alter any of the risk factor present.











Reference: This article and charts came from: Perdue University
To learn more about Bloat click here to read the articles on Bloat or Gastric Torsion Click Here for more information on Bloat






Table of Contents

Volvulus To calculate your dog’s lifetime risk of GDV follow these steps
Based on the findings of the five-year prospective study of Volvulus (Bloat) or gastric dilatation-volvulus (GDV) at Purdue University, graphs were drawn to help owners of large (50-99 lbs) and giant (>99 lbs) breed dogs estimate their dog’s lifetime risk of developing GDV
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Volvulus Beginning







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