KY hills,
I think in most cases especially around the extremes (over 30 or close to 0) I think the EPD is pretty good. Breed below avg docility cows to the high end bulls and the resulting calf is better than the mother.
I respectfully disagree. Docility EPD's are extremely subjective at best.
I have 0 confidence in that EPD and while your statement on its application is logical it does not work that way in all situations from what I have seen.
I've shared this many times on here, one year I bred some heifers to a certain bull heavily promoted as a breed leading docility, calving ease bull. We got 2 calves by him from a daughter of Image Maker and a daughter to TC Franklin (Franklin is a sin of TC Total which is known for siring good disposition offspring).
The Image Maker heifer had a heifer calf and I was expecting a bit of a skittish calf from her because the mother was somewhat standoffish but definitely not hard to work with once contained.
The Franklin daughter had a bull calf, and I just knew right from the start that he was going to be a keeper for herd bull because his mother was just so calm and the sire was supposed to be. Well it wasn't long until those calves true disposition came out. They were "Absolute" crazy. One day you could almost pet the bull calf, the next time if he saw you 100 ft away he would almost break his neck running into a fence to get away. That got more pronounced as time went on. He took a gate of the hinges in the working alleyway.
The other calves their age by my Bismarck x In Focus herd bull would literally just stand and watch those two crazy calves.
The heifer calf was as pretty a calf as I've ever raised in 30 years, and bull looked decent, but due to their craziness I just loaded them up at weaning and sold them as feeders rather than to fool with that and risk them ruining the other calves.
Another example was we AI bred sone commercial cows to the old bull Lead On again supposed to be decent docility, but they were unusually flighty too in comparison to other calves.
I have had decent results with the dispositions of Hoover Dam and Power Tool calves which both have above average docility numbers. Have also had decent results with various other New Designs, Bismarcks, and a Frontman that all of which had average or low numbers.