That is awesome! So happy to hear that Zorro is back!!!

Besides the bath, in regards to the other kitties, you might try an old trick a vet told us to use when DP and I first tried to integrate our dogs - who had several trips to the vet due to their nasty dog fights - take some perfume and spritz just a tiny amount on all the cats behinds. They are less likely to shun and fight if they realize they all smell the same.