That about sumed it up, with fantails the young will always favor the other breed tail wise and you will never show these birds. As for repairing like they have said it only takes a couple of weeks with a new mate and off they go, however if the pair can still see each other it might take longer if not at all.While I do not keep fantails myself, I do know people who have them and who have crossed them. The offspring won't be showable. However if you have several years to devote, you could breed that offspring back to the fantail standard through very careful, selective breeding. Hopefully someone else can come along and supply some additional input. Looks like not many people are online tonight!