I assume you've tried to milk a range Hereford?..Hell, you could milk a Buffalo if it didn't kill you.
They milk water buffalo in italy for one of their high dollar cheeses. Hereford are really a tame cow, I could break one to milk in about three days. And yes I have put many a beef cow in the head gate and milked her to prevent infection, when they have more milk than the baby can suck.