My oldest is 8 he gets seeds along with veggies and some fruit but the first ingredient in pellets is ground corn, corn is fattening aswell and can cause fatty liver disease esp if birds are clipped mine are all flighted.Thank you for your concern! See that is what I thought at first too, but while wild budgies are naturally seed eaters they also often fly around 200-300 miles in a couple of days. Seeds are very high in fat which in a wild budgies case would give them the energy to fly for hours on end, but for a budge that lives in a cage and only has a couple of rooms to fly around all that fat isn't necessary. in fact, pet budgies that live on seed often become overweight, which puts a lot of pressure on their organs and can cause liver and kidney problems. Also while wild budgies eat a lot of seeds they also eat fruits, veggies, leafy greens, and the occasional bug. So a pet budgie that is living off a seed diet would not be getting all of the nutrients that they need. This is why I am trying to wean mine off his seed diet and into a pellet diet. Pellets are made to have most if not all the nutrients that a budgie would need. Of course, I will also try to convince him to try some fruits and veggies to help supplement his diet I will also offer seeds occasionally during training and as a treat.