TB -- yes. We've milked over 100 before but right now it's around 60-70 head. He's always felt it's simplest to run everything together and over the years I've decided I agree completely. The percentage of cows with ketosis, milk fever, dystocia, etc is very low so there's never been a reason to do things differently.
The herd is basically run like an organic operation; in fact, the entire heifer herd and most of the hay fields are certified organic. Nowdays he rarely dry-treats unless there's a nice cow with a clinical case of mastitis prior to dry off. Before I left for college it was relatively common to dry treat everything, culture fresh cows, culture any new cases of mastitis before and after treatment, etc. I took care of all that and the records. After I left it was just his boys and later a neighbor kid, and so he didn't dare put anything on antibiotics. Boss does spend a lot of time in the barn, but not enough to be comfortable leaving kids and hot cows in the same milking barn. :P