To start, I'd like to say that the only similar topic I found was about auto sorting lions based on specifc features. What I have in mind in specific to cubs.

I and I know many others have specific caves for selling and give aways. I've even seen caves for training adols. As someone who enjoys mass breeding, it can get tiresome to have to check each cave to a) remember when they wean and b) gather all the weaned cubs to assign them to their correct cave. What I'm proposing is to set each cub to, upon weaning, automatically go into a certain cave upon the rollover of its 5th month.

I could see 2 ways of implementing this:
1) In each cave, assign a cave for all the weaned cubs born in that cave to be transferred to. For example, all cubs born in Cave A will go to Cave B upon weaning.

2) On each cub's page, there would be an opton to assign a cave upon weaning, so you can assign individually. This would probably replace the cave setting that already exists, as as far as I'm aware it is essentially useless for cubs under 5. When you specify the cave and update, the message could change from what it says now (You updated this lion's details! As this cub is still nursing, its cave has been set to the same as its mother.) to something like: You updated this lion's details! As this cub is still nursing, it will stay with its mother until it is weaned. Or something similar, I'm open to better ideas.

Feel free to add any thoughts or questions!