A sale of animals ordinarily involves the same considerations as the sale of any other personal property. Such sales are generally governed by the provisions of the Uniform Commercial Code. For example UCC § 2-105(1) specifically includes the unborn young of animals in the definition of "goods."
This form is a generic example that may be referred to when preparing such a form for your particular state. It is for illustrative purposes only. Local laws should be consulted to determine any specific requirements for such a form in a particular jurisdiction.