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.