My stepdaughter’s ex-husband married a Native American woman and they had a baby together. Since most Native Americans have extremely straight hair, she did not want her daughter to have this hair so she found an old folk way of making it wavier for when she grew up. Right after the baby was born, she went out to the pastures to where the cows lived and took back some manure. She took the manure and rubbed it on her baby’s head because this was supposed to ensure that when her hair grew in, it would be wavy or curly and not straight like traditional Native American hair.
How the hair grew in I don’t know, but this belief was passed down through Native Americans to use on their children to avoid the extremely straight hair of their people.