Chickens don't have teeth either. The pellets are small enough to swallow. They get moistened in the crop to loosen the hold the binders have on the ingredients. That softens them enough the rest of the digestive tract can do its thing. Ducks have a crop and gizzard like chickens do.
Anything they eat has to be small enough to make it down the esophagus.
Thank you. Our chicks are still on crumbles so I didn't think about that, but I did think chickens pecked their food into small pieces so pellets wouldn't be a problem for them when the time came, lol.
A chicken's bite isn't strong enough to break a pellet.
That's why, when one feeds table scraps and raw veggies, they need to chop them up finely.
A chicken will ignore a whole carrot or broccoli stalk but will gladly eat tiny pieces of same.