Granny have you tried this:
Meyenberg Powdered Goat Milk, 12-Ounce Cans (Pack of 3)
http://www.amazon.com/Meyenberg-Powdered-Goat-Milk-12-Ounce/dp/B001E5DZTS/ref=pd_sim_gro_6
Meyenberg Powdered Goat Milk,<<<
The company is an old company, as I recall.
I have not used the dried or canned goat milks.
I do use the dried buttermilk powder from Walton feed.com in all my baking.
Why not check Walton’s, but I don’t recall goat milk there, could be and they will be so much cheaper in the big can, which keeps fine, sitting on the shelf.
When I started the big can of buttermilk powder [#10? almost a gallon size] was about $2. more than 4 ounces in the super markets.