isn't this the same as a dog who is born blind or with one eye?? they learn to over come....their hearing gets sharper. i have a shepard/rottie mix and he only has sight in one eye. he has always had his head to the side alil so to over compensate for his disability. only time can tell whether this is a "BAD" trait. until then it is a personal choice to own and breed. to not own etc.