I have noticed that many Canadian Shorthorns have some Lincoln Red in their ancestry. I can't seem to remember at what percentage they were allowed into the Canadian Herd Book. I know there were a few US Shorthorn breeders that used a little Lincoln Red breeding, also. I read on the Lincoln Red website that at one time they were recorded in the same herdbook as Shorthorns and later split off. I also read where later they introduced some Angus and Red Angus blood to get the polled gene and, after several years, one bull was allowed into the herd book to propogate that gene. I've read for years a little Shorthorn blood was used to develop Angus. Interesting how these breeds have developed over the years.