Not long after the description of Crunchy Worm was released, people started worrying for the market's stability.
That's because IF the crunchy worm works as the description says it works (Crunchy Worm upon use will have a big chance to duplicate mother’s looks onto 1 cub from the litter, presumably 40%), it might very well flood the market with special, rare bases, eyes and markings.
Think about this for a while. Special lionesses could be duplicated and sold, and then duplicated again, and again. Event rare bases would become a "on demand" trait, as long as you have one lioness and one crunchy worm.
This would basically drop the price of specials, rare lions, and make applicators and some of the other breeding itens we know and love obsolete.
In other words, if everyone is special, than no lion is really special.
It has been suggested to make it an utterly expensive item or to drastically lower the chances.
I propose another solution: Changing how it works to make it essentially a female version of the "Keep Old King's Looks" feature in retiring.
If we ignore the fact that this item could potentially break the market, it is an awesome tool for those that do not want to lose a beloved (or very expensive lioness) or have thematic prides.
Because sometimes, no matter how special and awesome your lioness is, she might die and not leave a single keepable cub behind.
So I propose two possible options:

1 - Make a lioness permanently infertile AFTER the effect triggers.
This way, she can only have one duplicate, and won't flood the market. Just giving the crunchy worm would not make her infertile, though, only giving birth to a copy would.
Something about how exhausting and demanding such a pregnancy was for her.
This infertility cannot be raised by breeding itens.

2 - Make it usable only on 12 years old lionesses or older.
This basically guarantees they will be used only on their last heat, such as in the case of you having a lioness that has lived enough, but you want her to give you an heir or heiress because you have been unlucky with her litters so far.
As a secondary effect, instead of infertility (since she's old and will be permanently sterile anyway), make the crunchy worm's side effect of giving her a heat if she is on cooldown (but not nursing).
It has been suggested that, in such case, crunchy worm could work 100% chance, which I think is fair.

Every one of these options guarantees a copy, but it limites how many times a lion can be copied, and makes it so that there is only one reproductively active version of the same lion in the game.
So, I figured that this would be a nice option for those of us that want a nice chance to keep reproductive versions of their beloved lionesses, without flooding and crashing the market in the process.
This idea was gotten from Nyanunix suggestion: https://www.lioden.com/topic.php?id=304429283725&page=3

If no support, I would like to know the reason and if there's anything I could improve