I was just wondering how old my pup needs to be before i start feeding him adult formula? I've always heard 6 months, 1 year, and even 2 years. I took Kaiser off at about 8 months, and he is still pretty thin (he's now 1.5 years) Also, i was wondering if i really need to be feeding large breed adult formula vs. adult formula. I switched Kaiser from canidae to innova large breed, and it was 24.99, whereas regular adult was 21.99...thought that was strange. When i read the ingredients, the only thing i really noticed is that the large breed had glucosamine, which he already takes.