
Re: Socialization - "Oh Sh*t!" Moment(s).
Timing sounds about right. Vik expressed himself around the 8 month mark.
Sasha seems like she is having insecurity generated actions. Maybe she needs MORE positive reinforcement when she is calm and behaving well.
As for guests, put her in the crate until your guest has come in, greeted you, and sat down. Then let Sasha out with a greeting command and maybe load your guest with treats. Tell your guest not to look, touch, or speak to Sasha until she invites the pet. Her fall is coming in now and probably confuses her a bit. Putting her in the crate lets her know that she has to be calm when YOUR guests come into YOUR home.
Maybe before you take her into the street fair/market scene again, run/walk her and get her tired. That way, she'll have less energy to focus on her natural talents. You didn't mention how much excercise she gets. Not including daycare, which is a big playdate.
Vik was great IN his Therapy Dog training site, but a different dog outside, so they do figure it out and need guidance from us. Don't panic.....

She is just upping the ante and demanding more guidance. Good luck, and you know that any/all of the "grandmas" will help you through this. Your pup is just hormonally charged right now, so hang tough AND be consistant. I learned calming breathing excercises too. For me. LOL