I was using gain, but found the greyhound 28 stuff went threw my dogs after a while. The record breaker is a lot better i hear, but its hard to get where i am.
Red mills racer was bad their for a while, but, they have changed the formula and it does seem a lot better. I use red mills racer and excell, the excell seems very good for pups. I can also get this local to me, endless supply. I also feed raw along with this.