My dog is a cocker spaniel.
I don't believe she gets treats at the groomers no. She turns around and around in circles whilst on the grooming table apparently!
She certainly likes her food but is generally calm after breakfast until lunchtime when she gets a treat and then starts the daily routine of demanding food mid afternoon. Once fed she is calm again.
It has been happening for a long time now but it seems to be getting worse. She is eleven years old and has been checked by the vet for obvious illnesses such as thyroid problems.
Thank you Jane, that's very helpful.