i knew someone was going to come at me with the lagomorph argument but whatever... close enough to mice guinea pigs rats hamsters and gerbils and voles for me.
Simethicone, which is found in virtually all human gas meds, not just pediatric ones, works the same way in humans: it doesn't get rid of gas, it lowers surface tension so any bubbles consolidate into one giant fart.
I'm no rabbit expert, but that one looked pretty damn uncomfortable.