Anyone that is familier at all with cats would know what they are feeling just with a quick glance.
Talking about vets trying to make cats happy, my vet tries to give Minority these treats everytime he goes in. He doesn't eat them because they are too dry, he must not like the smell of them, and the poor thing gets so upset that none of the cats want to eat the treats. I think next time I will recommend Whiskas Dentabits. They might not clean their teeth for all I know, but the cats love the tuna flavour.