Tom, I'm not looking to "pile on" here, but really just because HILLS A/D is made for "Pets" does not mean it is o.k. to give to your leopard geckos. By the way, the digestive system of cats and dogs are also "much more robust" and "different working" than reptiles. For the sake of comparison here are the ingredients for the Hills A/D food:
Water, poultry liver, chicken, corn flour, casein, fish oil, sodium tripolyphosphate, guar gum, taurine, minerals (calcium carbonate, potassium chloride, magnesium oxide, zinc oxide, ferrous sulfate, copper sulfate, manganous oxide, calcium iodate, sodium selenite), vitamins (choline chloride, vitamin D3 supplement, vitamin E supplement, thiamine mononitrate, niacin, calcium pantothenate, pyridoxine hydrochloride, riboflavin, folic acid, biotin, vitamin B12 supplement).
Here are the ingredients of a jar of Beech Nut Stage 2 Chicken and rice dinner: carrots, water, finely ground chicken, peas and rice.
Much less extra ingredients in the baby food, which isn't a bad thing, I would rather add the vitamins and minerals that were needed specifically for my herp rather than having to wonder how much of the contents of the pet food are harmful to my gecko.