SCG - did you get any milk from your nanny? I was wondering how it tasted and what the difference would be between the cow milk taste and the goat taste. Diet, maybe?
No, my adult goat died before she was able to be bred. She didn't make weight until very late last year and by that time even though she was in heat, the bucks were out of rut.
Anyway, I have nubian milk in my fridge right now, my friend came over and finally got his turkeys and swapped me some goat milk. The taste is exactly like cows milk with a slight goaty aftertaste, that isn't unpleasant, just different.
Hygiene is a big part of it. Clean uninfected teats, clean bucket, immediately into the fridge. Diet is also a large part of it. The last part is genetics. The amount of fat in the milk plus the rest of the contents help determine flavor. Nubians are the most popular breed because they have a large percentage of fat in their milk and thus it tastes good.
I've read that in order of taste, for large breeds (I don't know much about pygmy), for closest to cows it is: Nubian, Saanen, LaMancha. In order of "grossest" milk, it's generally Toggenburg and Oberhasli can sometimes be really goaty, too. Granted, I've never actually tasted any but nubian...