Aww poor Brie, I'm so sorry you're both going through this. Hopefully it is just environmental allergies, and will disappear after the first frost. I'm also having ragweed allergy symptoms of runny nose and eyes and sneezing, and will be glad when it goes away. Hopefully it's not her food, it's really frustrating to try to find a food that they tolerate when there are food allergies, it's just trial and error until you find a food that is tolerated and doesn't cause allergy symptoms. Our Blossom is allergic to chicken, salmon, grains and corn, and it took us 4 food changes before we found one that worked for her. Both our guys have been on Fromms Beef Frittata, for the past year, and do very well on this food, but we had a lot of problems with pink face, warm pink ears, itchy skin, chin acne, and itchiness, and licking of paws, when we were trying different foods. She was taking Benadryl twice a day, and I felt so bad for her, but once you find a good quality food that they tolerate its great. You can try using the apple cider vinegar, as it might help, and it is a natural product, so will not hurt her, or cause any unwanted side effects. Good luck, and I hope she feels better soon. Please keep us posted on how she's doing. Feel better sweet Brie. Sending love, hugs, and prayers from me, Bulldozer, and Blossom.