Bird Flu….we have definitely had poison programs for ravens in our area to kill thousands of them and starlings during flu outbreaks near our chicken farms. Also enhance duck hunting. These are over three decades I know of.
Cow Farts….i wholeheartedly disagree with them being an issue, but name an animal in a confined feeding program as vast as cattle.
Pigs, sheep, yes, but much lower numbers and smaller operations.
And waste from the two latter is tons less per year.
And let’s not forget, cows digest differently so they absolutely produce more gas.
Try releasing cow bloat with a garden hose if you need convincing.