Teach your baby the sign for the word cow in baby sign language with the following description and video.
Form the hands into the signed letter Y. Hold the thumbs at the temples. Rotate the hands at the wrists. The sign for cow mimics the horns on a cow.
Beyer, Monica. 2006. Baby talk: A guide to using basic sign language to communicate with your baby. New York: Jeremy P. Tarcher/Penguin.