We have 7 dogs and use Kirkland's Chicken & Vegetable. We switched about 3 months ago from a 50/50 mix of Nutro Natural Choice/Diamond Performance blend. They were doing well on the blend. We switched to the Kirkland's after seeing many of the dogs we thought looked great & really healthy were on it. We have noticed most of our 7 are eating less, smaller, firmer stools and coats look great. We are spending MUCH less on the Kirkland's too. It's about $24 for 40 lbs at our local Cosco. The Natural Choice was $50 for 35 lbs and the Diamond was $30 for 40 lbs. We go through about 240 lbs a month so it's a HUGE savings for us!
For supplements, we do Glucosamine/Choindroitin/MSM. We also do raw veggies/fruits (carrots, cukes, zucchini, lettuce, peppers (bell not hot), celery, bananas, apples, etc) as treats. Fruits and veggies carry a lot of vitamins naturally and also help hydrate because of the high water content in most. In fact, I have dropped chopped green pepper and raw steak on the floor while cooking and my dogs went after the pepper not the steak! LOL
Spay & Neuter your pets, weird friends and relatives!!