Yes.
When I adopted Olivia in 2012 she had just had a dental.
She wasn't a very social cat (but there was something about her) She looked horrible, dandruff, hair coming out when you pet her, AND her fur was a pale dirty looking brown and an almost clear, off white. She had been abandoned and brought to the shelter by a "neighbor". (I found out by accident, a month after I adopted her, that she had been returned by her first adopter) That was why I adopted her. She really had no other prospects and I felt she deserved "a soft place to land" Maybe because I already had two cats that constantly wanted my attention, it wasn't an issue for me if she preferred to be left alone except to be fed. But, in general, I'm content to let animals (and people) be [themselves] they aren't required to earn their keep.
After weaning her off kibble and onto a combination of good quality canned and raw food, her coat began to get soft and PLUSH (she is short haired), her fur stopped coming out in clumps, but most remarkably, turns out Olivia is a tuxedo!
Feline Stomatitis | Diagnosing This Painful Dental Disease
"Feline stomatitis, despite the odd name, is actually a painful chronic oral disease in cats.
The condition is thought to be autoimmune in nature. In cats with the disease, the immune system overreacts to dental plaque, which triggers an often overwhelming inflammatory response in the tissues of the mouth, throat and even underlying bone.
Since feline stomatitis is very painful, symptoms in kitties can include behavior changes and reluctance to eat, which can trigger dehydration, weight and muscle loss. Other signs of the disease include excessive drooling, extremely bad breath and pawing at the mouth.
Treatment for advanced cases of feline stomatitis involves full mouth extraction of the teeth. As drastic as this option seems, it’s the only way to provide long-term relief and a return to good health for cats suffering with the disease."