 Image Number K9975-2 |
Red areas on the pig's skin indicate allergic reactions to food substances.
Photo by Scott Bauer.
An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.