If the bug-eye does not affect the quality of life of the snake, then I would breed it. IMO, the wobbling in spiders does not affect them, and I have bred them. I also have some super motley Nic boas that have smaller heads than other Nics, but it does not affect them in any way, so I will breed them. I would also breed scaleless snakes if I had them, because I do not feel that it affects their quality of life.