Are the pellets a bit too colourful to your liking? In that case, the bird food probably makes use of artificial colouring agents like E102, E133, or E122. It’s not about the looks, but rather about the potential allergic reactions that these dyes can have on your pet bird. Likewise, it’s a good idea to avoid pellets that make use of preservatives such as ethoxyquin, which is even banned in the EU, or that utilise corn syrup or honey in the pellets’ composition, as these can lead to liver issues and obesity.