Dairy cows going through the auction with the "cull cows" at slaughter price have one or more of the following things wrong with them...(in probable order of frequency)
1) open and/or infertile
2) not producing enough milk
3) mastitis, usually chronic
4) lame
5) "something else" - Johnes, hernias, past prolapse, bad attitude, etc, etc
I sat at the auction a few weeks back and watched cows going through. I recognized a few of them, believe it or not. Four cows from a neighboring dairy; had talked with the fellow not long before and knew why they were there as he'd pointed them out to me as they went through the milking barn. One was a first lactation cow - been serviced a dozen times and wouldn't take. One had a high SCC and mastitis. Then I saw a cow go through that I saw at my vet's clinic about 3 weeks prior; she'd been there for surgery to correct a displaced abomasum. Was it obvious to the folks around me?...I think not.
There was a "know-it-all" fellow behind me that needed a serious class in dairy cows - he had to comment on every cow that walked through the ring and I knew for sure that he was wrong on a significant portion of them, because I knew the cows. He missed the cow with the DA completely - pegged her as one with a "high SCC" - oh the willpower necessary to keep from laughing. :lol: ;-)