Teach your pup "down" and then teach her to rest her chin on a little pillow. Choose a relaxing time of day to work, when she is drained of energy. Work on this daily and it will become routine. Maintain a calm, confident demeanor. Be patient, but assertive. Speak to her in a soothing, praising voice when she is still.
Once the topknot is in, give her a treat and praise her some more.
I started by associating grooming with walks. The boys know they have to have their hair done before they can go out for a walk, their favorite activity.
Hope this helps, and good luck.
