Yes, chick starter is fine for him. There can be many brands of vitamins, but only Poultry Nutri-Drench and Poultry Cell vitamins have the selenium. Selenium is also in eggs, tuna, salmon, nuts, and sunflower kernels, so you can give one of those daily to add selenium to his diet. Foods containing vitamin E are canola oil, salmon, sunflower seeds, kale and swiss chard, so you can use those too.