It's not that they're having kits because they like someone, but because Starclan said so. I think you should restart, maybe with 1 day pregnancy. Then you could roll for a litter between 1 to 4, 1 you wait 3 days before giving birth, 2 for 2, and immediately for 3 and 4. Then you can make them all the same age. As for an island, i feel that Swampy Hills would be better. Or Grass Mingle, I swear that island has strategically placed swamps-