Not sure what to do. We're going to help a friend by AI'ing his heifer with him bringing her to us so we could CIDR, heat detect and breed. He said the heifer got out with his herd bull the night before he was going to bring her to us to start the process. He doesn't think he bred her (not sure what makes him think that). If we still go through with this as planned, what can we expect if we CIDR with GnRH on May 25, pull CIDR and Lute June 1, and breed June 3 - 4? Will the CIDR protocol cancel out the breeding if she got bred? If she cycles as expected June 3 - 4, does that mean she wasn't bred and the AI'ing will take like nothing happened? Should we abort the possible breeding before trying any CIDR'ing and AI'ing? If so, we'll have to wait until June 1 (11 days post breeding) to abort and then CIDR or Lute 5 days later.