Cat's teeth removed - won't eat

[meow]

My cat is 13 y.o. Her whole life she ate dry cat food (royal canin). She unexpectedly had to have all her top teeth removed due to some kitty tooth disease and was in the hospital for 2 weeks. Her vet is a dental surgeon expert. He said her mouth is healing nicely and sent her home. Each day she has been home she is eating less and less. Vet thinks she is "playing for sympathy from me" hoping she will get her dry cat food -- which she can never have again.

She liked human baby food - chicken. So I took her dry food, soaked it in water so it would turn soft, put the baby chicken food in it and warmed it. she ate it yeserday and won't eat today. she won't eat anything else either.

Vet told me to get a dog crate that looks like a jail, put her in it with litter box and food and a bed and keep her in there with no contact from me for 8 hours. Then check if she ate anything and call him. He is convinced she is being a brat and just hoping i will give in and give her dry food (which i won't/can't).

HELP!