No you should not increase the dosage. I would only give 10 drops twice daily on the canned food. I would also give digestive enzymes, probiotics, and Omega 3/6/9. Is your cat diabetic and on insulin? The amount of food you need to give depends upon the size of your cat and the kind of food you are giving. What brand and flavor are you giving her? What does she weigh and does your veterinarian think she is thin or heavy?