I will also add, I'm a hobby guy, run around 15 cows and a clean up bull so when I have calves on the ground I have round 30 or so head...... Polled Herefords. Been doing it for 13 years, I have had two cases of pink eye and I have never heard of anyone of my Hereford friends and contacts ever having a case of cancer eye ....... Knock on wood no prolapses either. I've cycled maybe 200 Herefords through, maybe more, in my 13 years ...... We bought our place in may of 2000 so I maybe going on14 years.
Herfs have their problems like any breed does but this is not your grandpa's or daddy's Herfs.
Alan