Original and low poly cow and bull.
Meshmixer and Netfabb Pro manipulation.
I was looking for a Brahman Bull and found RossEwart's scanned cow. I sculpted it a little in MeshMixer to turn the cow into a Brahman Bull (genetic engineering, I guess!). I then saved the new bull and the original cow and brought them into Netfabb Professional and did some mesh editing to reduce triangle counts to very low levels.