I'm a professional dog groomer, and though my basenji's tail isn't bushy I can give you 2 different options. 1. Go to a petsmart and get a pair of Martha Stewart Thinning Shears, essentially you will just scissor repeatedly in the same spot until all the hair is uniformly trimmed, (You can use a pair of small straight or curved shears, but it would be blunt and to unnatural looking). Or 2. go to a reputable groomer, get your baby a lovely bath, and ask her to do the trimming, if the groomer wants to shave it, tell her to do it with a "3 blade" or "5/8ths blade". that would leave the hair longer and not shaved looking.