HA yea, this just happened the other day...
Situation was, Sneakers needed just a Bortedella, and I took both with me. That's not a Vet involved procedure, so it was just a quick stop...anyway...
As I was paying out, one of the Nurse/Tech's ask if she could give my guys a treat.
I said "you can try".
So she offered, and both mine sorta sniff of stuff like that, and if they don't like it, they obstinately push it back with their noses....which is exactly what they did.
The nurse said..."I guess they're not hungry"
I said..."That's not it, you got cheep Treats"