I feed it, so long as it is fresh it's fine. If you notice a change in your chin, quit feeding it. It and the pro (gray bag) are almost identical. I find it's a great feed for growers just not the best for breeders.
Feeds also vary based on location, I'm in the south and Purina Complete is the most "stable" of the feeds we get during the winter. I switch to other things when the hay season starts and the pellet quality gets better.