We've got FAPA, Auto-nesting, and much more! It would be really convenient if we could have an option to mass-breed lionesses with one click.

It's like auto-breed, but for multiple lionesses.

Some people like mass-breeding and doing CRB projects, when you have big batches, it's way too annoying to go to each lioness's page to click a button.

This would be a feature like the option to nest multiple lionesses at a time on the nesting page. It could be under the cave/unsorted list where you select all the lionesses you want to breed and boom. It would say error if you don't have enough energy to breed them (5% per lioness, yes, there will be unsuccessful attempts) Say that you have 10 lionesses you want to breed, but you only have 40 energy. That's not enough so it would be an error. If you have 50 energy, it would be able to breed, but will stop when you're out of energy because of the unsuccessful attempts. If a lioness you select is not in heat, that would also be an error.

Edit: Got a suggestion in comments!
There can also be a toggle on/off feature where you go to a lioness's page and turn mass-breed on/off. This way you won't accidentally breed her if she is your king's daughter or something.

Honestly, I don't see what's wrong about this suggestion, so if you have any questions just ask!