While it's probably easy to discern the different animal features present in the Unimal, the official sources of inspiration were the chicken, cow, pig, steer, and sheep. A tiny toy version was produced for the kids, and in a manner similar to a Pez dispenser it would eject tiny plastic food items from its body by clicking a special button. Curiously, despite being created to teach young'ns about nutrition, the food offered by the Unimal (including a block of butter, a ham, hotdogs, and eggs) seemed to point towards high-blood pressure and cholesterol. One can only assume that a toy multi-hybrid vegetable wouldn't have been quite as popular.
Would you like to know more?
-Watch this excerpt from the 2009 documentary Farmboy.