Sportmix blue bag year round, and black bag for the winter time. Works just great for me for years. Dogs in great shape , lots of energy, sound and healthy. I feed 17 dogs. Can get 40# bags at tsc and 50# at a local feed store.
curdog3006...that is a good system you have right there...less fat in the summer to keep the weight off and more in the winter to help keep the weight on when the colder weather gets here...I mix in a tablespoon of used cooking oil/bacon grease over the feed in the winter months...even when I use the black bag...