Chickens are such tormented animals. The male are forced to battle gladitorial style by their masters of whom are obsessed with gambling, while their female counterparts are either forced to ay eggs for the rest of their lives or injected with growth hormones in order to be "harvested" quickly for human consumption.
In an alternate world where chickens gained intelligence at par with humans, enter Jake Gallo: a second generation "evolved" chicken dealing with everyday discrimination as their kind is still struggling from acceptance by the human dominated society. Jake then discovers a diary from his uncle, elmer about the time chickens first gained sentience. Their ply for liberty and an impending uprising against humanity. Jake finally learned the sacrifices his forefathers took in order for his generation to get there.