Not Sure About Prices But I Know I Can Find Them At The Local Farming Store (for Cattle) That Just Happens To Be Where I Buy My Pins, And I Have Seen Them There.
Hmm thats probably grey area...i bet it differes state to state...then again it could be federal, tough to say. Basically I have no idea what Im going on about.
They do make those new "Gummy Flintstone" Vit's now, you could possibly melt them down or disolve in BA & Throw the mix in a 21g X 1' and go to town.....lol
In that case then I would have 2 say any walmart