I had a cow calf a couple hours ago, 1/2 SH, 1/4 Saler, 1/4 hereford, bred Gelbvieh, never threw an ounce of white in a calf... She had a bull calf with white socks on his hind feet. The ones with some Saler influence seem to have longer lasting udders, well suspended and don't seem to ever sag.. Little bags that make lots of milk, and teats a calf can find.
I'm finding on my better cows it takes the calves about 2-3 weeks to start to keep up with the milk. I like the Shorthorns for the hips, and they can handle big calves without any problems, and the Gelbvieh really puts the meat on the back, which the SH often really lack. I got a Limo bull for next year's calves... I'll see how I like him.. I hope his calves are moderate framed, as opposed to my frame 9 shorthorns.