"Mathematician, computer science expert and animal rights advocate Brian Tomasik has attempted to catalog estimates of the number of individual animals in a variety of groupings. According to his data, the total number of individual animals on the earth adds up to approximately 20,000,121,091,000,000,000. This can be written as 20 quintillion, or 20 billion billion." (1)
"According to the FAO, the world has 1,468,000 billion head of cattle. (2) Octopuses don’t fart, nor do other sea creatures like soft-shell clams or sea anemones. Birds don’t, either. Meanwhile, sloths may be the only mammal that doesn’t fart, according to the book." (3)
Conservatively, if half of the 20 billion billion animals of the world don’t fart then that leaves 10,000,000,000,000,000,000 billion billion animals that do. The global population of cattle is ~1,468,000,000 billion head that means the number cows on Earth ONLY amount to .0000000001468% of the global population of the animals that produce farts.
In other words, there are 6,811,989,100,781 or ~7 Trillion times MORE wild animals that produce farts than cows. Even if you account for all the 7.6 humans (4) that produce methane we would only account for .00000000076% of the Earth’s animals that ALSO product farts, resulting in the FACT that there are 1,315,789,473 or 1.3 trillion times MORE wild animals that emit methane gas than humans beings.
Knowing this why is it that all the ‘FARTACANS’ can do is scream about regulating cow farts to ‘prevent climate change’? Well, maybe it’s because they are literally FULL OF IT to begin with!

(1) https://animals.mom.me/number-animals-earth-3994.html
(2) https://www.drovers.com/article/world-cattle-inventory-ranking-countries-fao
(3) http://mentalfloss.com/article/538743/facts-about-animal-farts
(4) https://www.livekindly.co/60-of-all-mammals-on-earth-are-livestock-says-new-study/