https://www.politifact.com/factchecks/2022/apr/13/facebook-posts/wasnt-bird-poop-bidens-jacket-it-was-distiller-gra/
According to poltifact a bird didNOTshit on Biden, even though they held the event in a giant barn with birds in it kek
But it was not bird poop that landed on Biden, according to the Des Moines Register. The paper reported that while there were birds in what the president called the "giant barn" where the event was held