Poor Ash. I'm sorry to hear that he's not feeling well and it may very be his teeth. My Storm was also refusing to eat his wet food and he only wanted to eat his dry food. When I took Storm in his teeth were in bad shape and he also had severe gingivitis. The vet said that sometimes when cats eat wet food that this will cause them more pain than when they eat dry food. After Storm's dental cleaning and having 2 small teeth pulled, he's doing great and is now back to his old self again. I hope that it's nothing serious and that a dental cleaning will help Ash feel good again. I'll keep him in my thoughts and prayers. Please take care.