How to make rarity affect baby's species?

[Dinocanid]

You could do this without doing any coding, like when creating breed adopts in the AdminCP. For example, you create a new breed adopt and set the parents. (one being the uncommon species and the other being common). Then you set the probability for that new common breed adopt to 75. Then you can create another breed adopt with the same parents, but make the probability lower. That way when you breed the two parents, there is a small chance of getting that rarer adoptable; that's how I do it anyway.

Unless you meant something different?