I bred and showed rabbits on the ARBA circuit for YEARS. I switched to pen pals when they were offering such great deals on food (like every 8th bag free, free small bags to give to buyers of bunnies, referral program) and all of the sudden I was having a heck of a time Grand Championing out lines that NEVER lost. I couldnt figure it out. Lines that had so much gold in them we had leprechauns following us were producing babies that had to be culled 75-80%. Removed from that food, never had a problem again. Took me an entire season to get the food "worked out" of their systems but all of the sudden my rexs had their coats again, my flemish had huge size babies, and all my english lops were breeding like rabbits.