> they don't have to make calves.Where else are you going to get them from? A calf factory?
> And the calves are an unwanted byproduct
Am I misinterpreting you again? Heifer calves are the prized possession that ensures that your dairy continues into the future. Cows don't last forever (or even all that long).
You maybe had a stronger case for bull calves, but now that modern breeding can select for heifers with ~90% confidence, that's hardly an issue anymore. And, I mean, in this day of age of high-priced beef, even if you get the occasional bull you're not exactly complaining either.