Chickens eat human feces too, but they are not considered "unclean". Plus, the one doesn't exclude the other. The taboo could be because of the reasons the par

Chickens eat human feces too, but they are not considered "unclean". Plus, the one doesn't exclude the other. The taboo could be because of the reasons the parent mentioned, and the "unclean due to eating feces" could just be a post-fact rationalisation of it.