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Originally Posted by bjh  Donna, I really have not shown yorkies that much and I still have lots to learn. I know the bite is important just as all structure is. Since there are no perfect dogs I was just wondering why breeders say never breed a dog with a bite that is not perfect but yet they breed dogs with other structural problems. All the dogs I have in my breeding program have nice bites but I still occasionally will get a pup with a bad bite. I recently had a litter with two over shot pups and that really puzzled me because up until that litter I had only had two over shot pups over the years. Both parents had nice bites so I guess somewhere back in the bloodline there might have been a bite problem or do these bad bites just show up no matter how careful you are? 
What is a rye mouth? |
A good bite is thought to be a dominant trait. Therefore both dogs can have a good bite but carry the recessive gene for a bad bite. Unless the dog or bitch is homozygous for a good bite a bad one will pop up from time to time. Those sneaky recessives, you know.
A rye mouth is where the jaw is actually twisted. It often causes the bite to be fine on one side and off on the other.