I had a simular success story myself.
We have been sorting the steer pairs from the heifer pairs, horseback, this last week. We sorted a group of them at the tail end of last week. We pushed the cows on one side of a long narrow pasture, then pushed any cow with a heifer calf away to the bigger side of the pasture. This was pretty fresh pasture to these cattle, and they were content to be about anywhere in the pasture without wandering much. It took 2 and a half days of sorting them to get the job done.
Then this morning, we started on another bunch that had about 20 less heifer pairs in it than the last weeks herd. When we rode out, they all ran to one fence corner, so we started pushing heifer calf pairs one way, and steer pairs another way. This should have been about the hardest way to make pairs, but these cows were looking for their calves, and with just two riders, we had all but two pairs out the gate in less than 3 hours. I was more than happy. And not one calf had a tag in their ear in either bunch. :lol:
Sometimes things just work. :wink: :!: