Simba's Tail

Managed to catch Simba with his tail showing (he usually curls it round himself very elegantly). It looks like it doesn't belong to him and that it's been grafted on from another cat! However, it is almost identical to his sister Mika's tail and was inherited from their Mum. Their Dad was a pedigree Siamese who liked to go out for a night on the town on too many occasions!