I have a 5mo Great Dane and belong to two Great Dane Facebook pages. One of those pages has been blowing up since last week with this same question about the recall— it’s literally been asked probably 25+ times because I guess no one can be bothered to scroll or use the search function lol. Anyway, it looks like most people are really leaning toward Purina ProPlan, although there are also strong recommendations for Diamond.
The problem with posing a question about feeding on any forum/page where people really care about their pets’ health is that you’re going to get a lot of strong and varied opinions, and much of it will have to do with how their individual dog did on a specific brand (and what they were able to personally afford).
Someone commented on one of the feeding FB posts on that page last week that she has had four Danes through her life, and she fed her first one Ole Roy bc she was young, uneducated, and poor. And the dog lived to be like 12, which is ancient for a Dane. Now that she knows and can afford better, she tried to put her current Danes on a much higher quality brand and found it gave them diarrhea. Her vet recommended she “downgrade” to a less rich food, so she put them on Purina and they are doing super now. So her point was the more expensive (and even the more “organic”) brands are not necessarily what’s going to work better for your dog or you. You have to make decisions based on what makes sense from the big picture.