I'm just not a fan of altering a heifer's estrus. In all our years of showing, it seemed like the heifers always managed to syncronize their cycles with the BIG shows. We found that if we were up to speed in our due diligence with the heifers, they just didn't give us much trouble at the shows when they were in heat. Our girls knew exactly what to do in all circumstances, which really impresses a Judge. I'll always hold to my belief that expert showmanship, feeding, fitting, and grooming will win more shows than a great calf lacking in one or more of those "handler" factors.