I recently purchased 10 heifers that are Angus/Holstein cross and due to calve in October back to Angus bulls. These came from a very strong dairy herd and sired by Deer Valley Angus bulls. What can I do to maximize their second calves? My end goal for second calf is replacements for the future. Leaning toward maybe a couple ET and AI calves from either Angus or Simmental. Any thoughts?