I took Cinderella to a different groomer the one time, and asked for cute puppy cut. The woman cut her hair down to next to nothing. She was also 5 months old. Cinderella was not well for weeks, because the groomer also cut her vulva hair too short, and was poking her tender skin down there. She couldn't even walk. She would just sit, and even at that, she would jump up and freak out as she sniffed down there. I guess the newly, sharp cut hair was too prickly for her. Sigh...what an ordeal she went through.
I called my regular groomer who has been grooming my shihtzu for almost 10 years, and she knew right away what type of cute Cinderella had without even seeing her. Commonly called the "schnauzer cut" or "puppy cut".
When I asked her how long it would take for Cinderella's hair to go back to how it looked before, she said the most interesting thing.
"Well, if Cinderella has never had her hair cut since she was born....and she's 5 months old...then I think it will be safe to say that it will take 5 months for it to grow back to exactly how it looked like before you cut her hair!".

Is that not totally true? It made total sense to me, I don't know about other member here though