I think spoofan just about summed it up, I've heard both leaving 2/3 on and 3/5 on, both around 60%-66% of the tail left.
LOL! I didn't even notice the date! xDI'm pretty sure your plea came a little too late! The original poster started this thread almost a year ago (January 2009!) Her puppies are long done by now!!! I don't mind the look of a natural tail, but my preference is the balanced appearance of a nicely docked tail. But that's a WHOLE 'nuther thread!!