I've always just gotten the regular "Co-op oats". I did a comparison several years ago with 1/2 the field co-op oats and the other 1/2 buck forage oats. Put a camera splitting the two in the middle. Could not tell a difference in preference whatsoever.
Planted my plots. Had rain day or planting about 11 days ago. Then this TS Fred came over. Going tomorrow to see if all my seed got washed away or maybe they stuck from them first rain. If it looks bad. I'm going to the co op and getting oats and winter wheat. Hoping for the best