Animal Welfare Professionals

Hi I am fostering to hopefully adopt a young 30 pound retriever/Dalmatian mix. We noticed all his toe nails (10) are white. Is that normal? I looked up that changing colors of nails could be a bacteria but I don't know what color his nails were before. We also is itchy very much (after a flea/tick bath and a dawn bath). We also gave him a flea pill and have started applying lime dip and is still itching a lot. Wondering if the nails and skin could be related or perhaps white nails are normal?