[quote=@Polaris North]
Oh, but I do have a question - aren't Medicine Cats supposed to be single for the rest of their lives since they've devoted their being entirely to help other cats and to Starclan? I think that was in one of the Warrior Codes, actually.
[/quote]

I always thought that bit of the code was really silly to be honest...I mean, they're cats, why are there friars/nuns in cat society? haha 

Plus, none of the cats in the series ever follow that rule anymore anyways :P 

[@ViolentViolet] Plot wise, a small idea that's probably terrible LOL but I'll throw it out here anyways, what if there was a new and rather virulent disease that appeared in the Clan territories at some point (I dunno...maybe rabies spread through the prey or something? o: ) that force the Clan leaders to agree that the Medicine Cats need to form an alliance together to better find a cure before the disease wipes out all the Clans? 
If they had to venture further out of their usual territories perhaps they could take a Warrior escort with them, a few of the best from each Clan, while the ones who are left behind have to avoid hunting the sick prey and try and care for their ill Clanmates without getting sick themselves?

Like I said, probably a rubbish idea but one I had anyways haha