I have very rarely heard a dog or cat make a noise farting but know they have when no warning was announced. Some do it more than others but I can only remembering hearing anything once from each of them. Is it because their bottom is a different design from ours?
I think that maybe you were not paying enough attention, im sure they do pass wind , it probably did it while u were asleep, (I take it that you dont have a round the clock vigil just in case there is a a windy moment ). Maybe its an issue that no one has really thought of before. i have never heard the sound of my dinner dropping in my belly but im sure it happens , my advice would be not to worry about it , theres far more exciting stuff going on around...
At the other end, burps are merely the rapid expulsion of air emitting from the oral cavity due to a spasmodic contraction of the diaphragmatic muscle.
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