Bird dog, thanks for your response. My point about your fall herd becoming a spring herd was that spring might better match your cow nutrition requirements to your grass during calving, post-partum and breeding. More cows bred, and bred early, means more calves born. Reproductive rate correlates highly with profit (SPA data). Weaning weight does not. Of all the things we do for our cattle, health, genetics, supplements, etc., by far the most impactful to profit is timing our calving season to our grass growth. Nothing else comes close. I hope Fred, the OP, is following this.