You could make some from animal available in the esri fonts.
For example, there is a cow availabe on the ESRI US MUTCD 2 font.
![](/legacyfs/online/482031_pastedImage_1.png)
Esri Conservation has some wildlife as well as Esri Enviro Hazard... don't forget to check the subsets.
![](/legacyfs/online/482032_pastedImage_2.png)
That said, I am not aware of an existing one for a pig.