I have a 14 yr senior(non-gsd) and feed raw with a Taste of the Wild pacific stream kibble topped with canned mackarel fed every few days for a meal. Lately, she will not eat rmbs, and I am sure it is because of her teeth. Bad breath and her teeth just in the past three mos. have gotten really dark in color. I don't think she can handle a gum scraping or any stressful vet attention. Is there supplements to help teeth stay healthy? Clover gets vit E, C and fish oil along w/ glucosomine daily(all human grade). I am thinking of taking her off raw as ground meats won't be sufficient without bone. I do feed green tripe every other day as well. Does anyone have suggestions for teeth health w/ a senior dog?