There are many shops throughout Neopia where you can buy food for your Neopet, and there is a wide variety of foods from which to choose. If you are having trouble finding items in Neopian Shops, why not visit the General Store where there are always items in stock!
There are also places to get free food for your Neopets, such as the Giant Omelets in Tyrannia. Neopets with fewer than 3,000 NP can also get a free bowl of soup from the Soup Kitchen in the Marketplace.