My Gypsie (rainbow bridge), a Great Dane, was the worst about gas; front and back. It only got worse as she got older. We learned not to feed her Dog Chow . Though, size of the animal definately does not determine the size of the stink . I have a little 4 lb. cat that has the WORST gas. Unfortunately, I found this out when she was laying on my chest with her hiney tucked under my chin . I thought I was back in basic training in the gas chamber. Needless to say, I keep her hiney far away from my chin now.