Cider was found stray at a deli, malnourished with teeth in horrible condition. She had difficulty eating her first few months but we had to wait to address her teeth until she was stronger. After she gained some weight we had her teeth cleaned and the infected teeth removed, and she was like a new cat! She became more relaxed, more affectionate, starting purring almost constantly (and hasn't stopped since!) and began eating more.
Because she is prone to dental problems we have cleanings for her almost every year and we give Virbac's CET Chews to kill bacteria and prevent plaque buildup. It's worth the investment for her happiness.