Thank you for the kind words, David. However my heifer development "program" consists of of fenceline weaning steer and heifer calves about 6 weeks pre-calving in the spring and putting them back in with the cows about 3-4 weeks after the last cow calves. I watch for any that try to suck again and pull them if the cow doesn't solve the problem, usually with a swift kick to last years calf. Much easier to manage one group whenever possible. 

Yearling steers and anything that didn't calve within 45 days of when she should have are pulled over the summer to go to the processor or sale barn and by Oct it's usually just Bred cows and their spring calves and bred heifers left to over winter.