I have to say, not docking Springer tails hasn't changed their carriage at all. They're just same, only full length!
This is perfectly normal. If you look at a Weimaraner with a tail you can often see why they were docked where they are as the tail changes shape a third of the way down and appears to have a natural docking point. Small amount of white hairs will probably disappear and in any case are, like white hairs caused by scars, not considered as an issue in the showring. she cost me £850 so would be dissapointed if i couldnt show her because of a white mark The cost of your dog does not necessarily reflect its quality! Nobody can tell if the dog will be successful in the showring at 7 or 8 weeks old................. Hopefully you bought her as a pet and any success you have in the showring or elsewhere is purely incidental!