You know, Don, I may be totally wrong here (likely), but when I was taught genetics, I was taught that in order to correct faults, you dont breed to the opposite. Genes dont work that way. A low tail with a high tail will not produce a tail in the middle, but 50% high tails and 50% low tails. Ive had a little more experience with horses, and it does seem to work that way. Ive tried increasing size with a mare that I have by breeding her to a really large stallion. Did that twice, got one colt that grew very large, and one that ended up small. None were in the middle.