I am considering a new job at 9,000 ft elevation. I live in KS now and my cows are all flatlanders. I'm worried that they won't survive there, and I'm wondering if anybody could share any info on brisket disease and testing for it. How many cows from lower elevation usually can't handle the higher elevation? I've got a nice cowherd built up, small but nice, and I really hate to part with them. Can I test these cows before taking them to that elevation or do they have to be at that elevation first? Any info on this would be appreciated.