For those interested in these things, I used only lead whites, no Titanium (which I very rarely do, but it made for a very different painting experience) plus Mars Red, Naples Yellow, Chrome Yellow Hue, Yellow Ochre, Cobalt Blue Hue, French Ultramarine, and a bit of Cobalt Violet.
The last of these colours is extremely expensive, and I wouldn't normally use it - but I have a very old tube, and indeed apart from the white just about all the paint used in this was decades old. In oil, you can do that - in the tube, the paint rarely deteriorates.
I don't think I've ever painted a cow before - and they're not especially easy.
Determined Cow, oil on board, 8" by 10"