Rabbi Sholem Fishbane, Kashruth Administrator at the Chicago Rabbinical Council, says:
You would think, with so many cow sh'chitas in America, with so many, you know, steaks, what we have, that there would be [udders easy to find], but doesn't — no one seemed to be doing [sh'chita on] milch cows.
It sounds as though he means a lot of kosher beef in America is from cows (female animals)[1] — just not from, as he puts it, "milch cows", cows that are bred for milk (or that are nursing).
Is it possible that that's what he means? In other words, is there in fact a lot of kosher beef in America from cows? I ask because I've always understood that kosher beef in America is from male animals exclusively or almost exclusively.
[1] which is why he'd expect udders easy to find