I could do a few more variants, ATM the belted alcaire cow has the most variants, but it also has a lot more colour variation (red, brown and black) These are just black and brown.
Might just need a black bull to go with 2 black cows and 2 brown cows and 1 brown calf and one black calf!
But i think I'll move on and do a highlander style mini cow that comes in solid, mottled and white colouration. I'll call it the cambrian silver.
I definitely need to focus on sheep or at least goats next though!