Never and I don't allow anyone else to either. Most of the time you can condition them to tolerate all the stuff you mentioned. My oldest doesn't like when people other then family grab her collar and one day she was sick and throwing up and a friend grabbed her collar to pull her off the bed, she bit him. Completely his fault and he never did that again. She might have been okay if she wasn't feeling sick to begin with. I can grab her anytime with no issues, I do request a muzzle for my little spitfire at the vet , even though she has never gone after them.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD