in the horse and dogs i have raised, breeding for athletic ability and trainabilty just to name a few traits i was looking for, i havent seen much difference in the out come of line breeding in horses and dogs.
something i havent heard mentioned much is the trainer, the man at the reins or lead has alot to do with the out come of a dog or horse..
just my .02
I have seen above average hog dogs go to another hog hunter/hunters and within 6 months the dog was pretty near a cull.
I also saw someone who had a horse that gave him a lot of trouble and wouldn't move forward. This same guy got another horse that was a good hunting horse that started doing the exact same thing as his previous horse. I totally agree with your statement.
