My boys get Atison's Betta Pellets, Tetra ropical Granules, Tetra Tropical Crisps, whatever frozen food i have at the time, whatever bigs crawl into the tank, sometimes live blackworms. The blackworms IMO are the best for picky eaters. My delta tail would only eat blackworms and frozen bloodworms when I got him, but now he eats anything and everything. Guppy fry every now and again don't last long...