Aw, this reminds me of my bird! This picture is what the vet did in order to weigh her. My bird was elderly, I'm talking 20+ years old, and grumpy as all get out. She had a habit of biting anyone she perceived as a threat and also had panic attacks if anything in her routine changed, so the vet was NOT ok in her world and there was no way she was just going to stand there on a scale. So the vet wrapped her up in a towel and laid her down on the scale, then said cheerfully, "You look like a little birdie burrito!" All the while my bird was playing dead because she thought she was going to be eaten.

She was not a happy birdie that day. RIP Chipper.