Great! I was worried the breeding would be missed by players.
Yeah the Child Bonus fills slow for early game frogs (also higher levels of Child Bonus fill slower). But, once you get stronger frogs it fills in one round usually. The strategy is probably to make babies with weaker frogs before it's full and only fill it for stronger frogs.
Thanks for the feedback!
Edit: I added notes in description to communicate that Child Bonus fills slower the more full it is.