Shoot the birds with an arrow, and slash at the bulbins on the boars, or shoot them with arrows if they're not close enough. If a bird drops a bomb on the carriage, just follow the carriage until it gets back on the path. If a bulbin sets it on fire, put it out with the Gale Boomerang.
Z-TARGET THE BIRDS OR ELSE YOU WILL DIIIIIIIIIIIIIIIIIIIIIIEEEEE!!!!!! Trust me, this caused so much frustration.
The Cheese says: Hire The Cheese.