Congrats on the new pup! 🙂
All the foods you mentioned are great except I would avoid the Kirkland – it’s manufactured by Diamond (poor quality control/frequent recalls). I’d actually recommend rotating between the foods – the earlier you start a rotational diet and get your pup accustomed to a variety of healthy foods the better! 🙂
Grain-free diets are recommended because grains are not a natural component of a dog’s diet. Kibbles containing grains are often (but not always!) lower in animal-derived protein and carry a higher risk of being contaminated with mycotoxins. Many dogs also seem to have food sensitivities with symptoms that subside once they are switched to a grain-free diet. Grains are also inflammatory, contain anti-nutrients (such as lectins) and many (like corn) are often genetically modified. With this said, not all grain-inclusive kibbles are bad. The thing is, a starch component is necessary in kibble. Ideally a dog’s diet would contain no grains or starches but starch is needed to bind the kibble. Starch can be present in the form or grains, legumes, potatoes, tapioca or some combination of these. The thing is, many of the grain-alternative starches carry many of the same negative attributes as grains. For this reason, when feeding a kibble I believe the most important thing to look for is a high level of animal-derived protein – I prefer foods with over 30% protein with over 80% being animal-derived. Two quality grain-inclusive foods are appropriate for large breed puppies that I wouldn’t hesitate to recommend are Dr. Tim’s Kinesis ALS and Annamaet’s Ultra Formula.
