Otter, I'm actually not using anything right now because I haven't begun raising and showing rabbits again. That's on the horizon, but has not come of age yet.
I had almost my mind made up to use Professional Formula Purina AdvantEdge, but thought differently of it when I got the latest copy of Domestic Rabbits and saw the Nutrena ad. I can get the Nutrena from a dealer which is located a bit closer to where I live, too.
On the flip side, the only feedback I got about the Purina feed when I asked about it on here was from one person in Canada who had nothing really positive to say about it. Other than that, the people at the last show I attended said they've encountered problems with Purina feeds in the past and had given up on them. Professional formula was the only Purina feed they had anything good to say about.
At this time, it's a coin toss, but I really like what I'm hearing about Nutrena's product so far.