The big white spot isn't normal discoloration. It's pussing and hasn't been there before. The first picture is just to show how big she is compared to the others. She's abnormally long (not sure if that matters, but I love that about her).

The dosage information is based on weight and has the info in the package. I have a scale to weigh her on, but didn't want to do anything until I got a second opinion from someone smarter than a petsmart employee...

The ingredience are listed and as follows:
Ingredients: Egg Product, Wheat Flour, Starch, Isolated Soy Flour, Corn Oil, Dried Brewer's Yeast, Dried Kelp, Calcium Carbonate, Dicalcium Phosphate, Pollen, Dextrose, Sodium Chloride, Potassium Sorbate, DL-Methionine, Lecithin, Choline Chloride Supplement, Potassium Chlorine, Spirulina, Manganese Sulfate, Mixed Natural Tocopherols (Antioxidant), Zinc Sulfate, Magnesium Oxide, Ascorbic Acid, Beta-Carotene Supplement, Niacin, Vitamin E Supplement, Copper Sulfate, Vitamin B12 Supplement, Vitamin A Acetate, Calcium Pantothenate, Vitamin D3 Supplement, Pyridoxine Hydrochloride, Menadione Sodium Bisulfite Complex, Riboflavin, Thiamine Mononitrate, Ethylene Diamine Dihydroiodide, Biotin Supplement, Folic Acid, and Sodium Selenite.

Thanks you so much for your reply and help! I'm so nervous and don't know what to do!