Hi,
I just typed my post and was previewing it, when it said there had been another 5 posts, so applogies if I seem to be repeating what has already been posted.
I breed and train ISDS reg border collies, you cannot register any puppies until both parents are eye tested by an approved vet for CEA & PRA, some dogs are also DNA tested for CEA. When a dog has been DNA tested and the result comes back as either having CEA or as a carrier, you can still breed from these animals, BUT only if bred to a DNA tested clear animal, the resulting pups would then need to be microchipped and DNA tested before they can be registered, the results of the DNA test will then be printed on the reg certificate. I believe that the only way to be sure when vetinary eye testing for CEA is to test puppies under 8 WEEKS of age, after that, carriers of CEA can sometimes appear to "go normal".
As for hip scoring, I personally don't do it, as any dog I have that cannot do a hard day, gathering ewes and lambs out on the hill, would never be bred from, but the incidence of HD in collies that actually work stock is very low.
The very first dog that I bought as a pup, and then trained, had CEA, I didn't find out untill he was 2 years old, but I thought something wasn't quite right, however once I knew what the problem was, I found that I could work around it. When I took him sheepdog trialling, I could only send him on a left hand outrun, he always crossed on the right, and sometimes when he was following sheep he would appear to lose sight of them, he was a great dog and did very well for me, he lived until he was just short of his 16 birthday, and is buried in the orchard, under a greengage tree.