If I was you I definately would NOT dock her tail at this late stage especially if there is no real reason why you think you need it docking apart from " it looks much nicer". I like cockers both docked and undocked.
Billy was docked when we got him, i didnt choose him because of this, he was already docked ,but if he wasn't docked, and it was legal to do so, there is no way on this earth i would have had him docked at 3 mths. I just don't see the benefit of doing so when he is just a pet. To me i think its too much risk and not to mention the pain it will cause poor little Popis
. Its so unecessary really
I would say if after reading these posts and having had time to think, you are still unsure about what to do then dont do it. As once its done there is no going back
Keep in touch and let us know what you decide