The local feed store will have it for cows I used to live right next to your state and we gave them meal and salt in the winter for a supplement.
The last time i was at the store the gal pointed me to the garden section no I said for cows.
She looked up the price and almost died.
Garden ten dollars for a little wee bag.
Cows 20 dollars for 50 pounds.
Yep I told her it is the same thing.
Worth