I'm neutral on this suggestion honestly. I've played another pet game with breeding elements that allowed you to generate basic/no gene pets with custom colors and no restrictions on it with an item and saw how saturated the pet market there was in general with most pets, even fully gened ones bordering on unsellable, having it once a year or less is definitely an interesting idea for a site event such as the anniversary or user birthday and not something I think I'd be entirely opposed to.