My cat has been diabetic for about three years now(he is 12 y.o. and 18 lbs.) He has been fed this dry food as well as the Purina DM, and the canned foods by both as well. He has gone in and out of remission over the years. In the last few months, however, his numbers kept in the 250-300 range. I was so frustrated. We had to keep giving him more Lantus until it was 8 units two times a day. I started reading and see that many people say the dry will not help and this is pretty confusing because the "Prescription DIet" is supposed to be the best. I stopped the dry and continued with the HIlls canned. As others have said, his numbers droped drastically- 40 and 50 some days, and now is normal again (150, 133, etc). Fortunately I am able to do the BG tests at home, and urine as well, so I can adjust based on numbers. I am ready to change to Fancy Feast and Friskies Pate canned food- they are getting rave reviews and are less expensive. Slow transition from one food to another is necessary.