I would wait until she is about seven months od. Once you clip that coat off, they go from a cute little puppy to an adult in one visit to the groomers. You cannot glue it back on. If you put her in her adult haircut at seven months you get to avoid the dreaded coat change too!! BONUS!!! Maybe have the groomer clkip her back with a long comb in the interim. Maybe I am just a sap, but I like them to stay babies as long as possible because they are going to be adults for a long time, and their puppyhood is so short lived.