How long would a 35 pound of food last?

I've already answered your question in regards to proper foods for great dane pups, which this certainly isn't,but in answer to this specific question, no...a 35 pound bag will not do a growing pup two months. Especially a grain inclusive food with the type of ingredients this brand has. The body won't digest most of it, so that means..more waste which in turn means, they need more of the food. You'll be LUCKY if this lasts a month.