Sound Effects are here

Now you'll occasionally hear clucking, flapping of wings, digging in the dirt, and other chicken noises.

I know I could have found some chicken-y sounds on the internet somewhere but there's something beautiful about taking the outside world and putting it in a game. I visited a friend with a lot of chickens and got up early to record them proudly (i.e. very loud and annoyingly) crowing after laying eggs, their greatest moments. In the game you'll hear those crows at the end of a race, a racing chicken's greatest moment. There's also a lot of occasional ambient chicken noises I think you'll enjoy.