I just got the paper back on my Angus heifer. First thing I noticed is that the registration papers look a little different (its been about 2 yrs since I've had one that I registered, I've just been selling calves) and on the bottom part of the paper it said something along the lines of "an ancestor of this animal has been shown to carry Arthrogryposis Multiplex (AM) and you should have this animal DNA tested soon to rule it out blah blah blah". So my question is, how do I determine which ancestor it is that is the carrier? I want to know this because 1. I probably wouldn't want to use that bull again if it is the bull 2. About half of my herd is made up of her maternal side (dam, granddam, dam's sisters, etc.) and if it is a problem on that end I am in big trouble. I assume if it was something on the maternal side I would have heard about it before now but I wasn't sure if this was something newly discovered. I tried using the AM search function on the AAA website but it won't work. On the Genex website it says that the heifer's sire, RAB-EGL Blue Moon 4407M is "AMF" which I assume means AM free. Also, the reg paper says I should get DNA testing (which I assume would just be tail hairs?) done at an "approved lab"-what would be an "approved lab"? If someone could help me out and point me in the right direction I'd sure appreciate it. This kind of things makes me not love my Angus so much :? :help: