I Am Owner Training My Service Dog

So on today’s episode of uneducated employees.
Retail worker “Well he’s not wearing a vest””, and he’s an aggressive breed”
Me “ for 1 any breed can be a service dog, 2 rotties aren’t aggressive, and 3 he’s a Swiss mountain dog”
Worker “ still needs a vest”
Me “ actually Ada law states that he does not, and I refuse to allow him to over heat in 110° weather by wearing one today, I will happily go grab the police officer that I was just chatting with for you.”
Worker “well I guess I’ll let you stay but I don’t have to”
Me “actually you do, have a nice day”
EDUCATE EMPLOYEES PLEASE