Suz, it's only my best guess. Both bales are of the same grasses; however some of the hay laid longer in the field before bailing. It also may have been rained on and that’s why it has a sun bleached look. Should still feed out reasonably well but will just have a lighter straw looking color. Personally with only two adult goats I'd spend the extra money on the greener looking stuff....depends on what your budget.

 

Sunbleached hay has lost almost all of its vitamins, and possibly most of its nutrients depending on why it's sunbleached. The producer discounted it because it doesn't have as much feed value as the green stuff (but not enough to make it worthwhile to buy).