So, the topic has come up time and time again. . . And I think there is variability depending on whom you talk to, at the result of different bitches needing different things and different lines being prepotent for different things. I've spoken with some who feel that heads are the hardest to breed for, and others feel that fronts are hardest, while yet others feel that rears are most difficult.
For me, it's been mouths. While I understand the others, it seems that if you go to a dog with a good head/front/rear, from a line that has good fronts/heads/rears, for the most part, you'll get good fronts/heads/rears. . . But, from my experience, mouths are a completely different story.
First, like fronts, I think that truly good mouths are few and far between. I'm not sure that I've ever seen the truly desirable boxer bite (straight, tight, wide with canines in line with incisors), and I've spoken with many who feel that they have good bites, only to look inside the dog's mouth and see a narrow bite.
Second, inheritability is completely unpredictable. I recently took a bitch with a bite that is round, narrow and too undershot to a dog with a wide, straight, tight bite, from a line known for producing this trait. . . All of the puppies in this litter inherited wide, tight, straight bites, with some slightly narrower than others, but pretty consistently correct just the same. I've been told that I would have to take all of those puppies to correct mouths (with parents that have correct mouths), if I want to retain those good mouths. I've had a level bite in my house, where I was told by a long time breeder to take her to a correct mouth and I'd get gorgeous bites. In fact, of the three bitches that I've had over the course of the last ten years, from different lines, I have not had a truly good bite in my house.
Third, terminology is completely mixed in our breed. How many people know how a reverse scissor differ from a correct boxer mouth? I'm not sure that I do, to any definitive detail, or at least not in so much as to be able to completely discount a reverse scissor as anything other than "too tight". In fact, I've heard some (outside of our breed) refer to the boxer mouth as a "reverse scissor". How can we determine how "undershot" is correct when our standard isn't even explicit in this area? Do we really strive for the classic "pencil width"? Or would the average breeder consider that to be "not tight enough" today?
Do you feel that a consistent vision of what a truly correct mouth is exists in today's breeder's mind across the board? If not, then why is there such an emphasis placed on it in our breed?
What do you feel is the most difficult thing to breed for in our breed?