hi! My two Sphinx are 2 and 3 years old . My Canadian is 2 and my Donskoy is 3. I had the Donskoy teeth cleaned 6 months ago. Both of them have red gums around the tooth bed. The Donskoy lost an adult tooth this week. Both are going to the veterinarian tomorrow . I am feeding them Orijens dry food and Soulistic wet food. I’m just trying to figure out what is the best food to help their teeth they are both picky eaters and allergic to chicken . Any help would be greatly appreciated.