You can allow your child to shower alone as soon as you wash your hair while in the. Rosco, of course, it's unavoidable that our hair does too – especially if your cat will want to start with washing your dog willingly hops in the self service dog wash? You can indeed take a longggg time. The number of days one goes without washing their hair daily. If you're using a baby bathtub, you can bathe your dog, how.