Having tried their Goat Milk Protein Powder, I also was able to try some of their dehydrated goat whey. Whey is a by-product of the cheese-making process, essentially the liquid portion of the milk. The healthfulness of it, is that it has a high concentration of various minerals (calcium, phosphorus, magnesium, sodium, potassium), and is alkaline-based (to offset the acid-ness of your body). It is also rich in electrolytes. This is not as good tasting as the goat milk powder, but not bad.
My sister gave me this trial sachet of St. Francis Herb Farm's Go Pro Matrix goat milk protein powder. Goat milk has more health benefits that cow's milk, it has short chain fats and proteins, similar to human mother's milk, as opposed to the long chain fats and proteins of cow's milk (which is likely why many people experience issues with digesting cow's milk). The protein content of this protein powder is 15 g per 2 level tablespoons of powder. It has a pleasant vanilla taste, and blends easily in smoothies, or added to hot or cold breakfast cereal (what I did with this). It's likely much more expensive than the more available cow's milk protein powders, but I've seen it available for sale in a number of health stores near me.
