When choosing a pellet diet for your bird, please realize some pellets are “complete” and others are “incomplete.” Usually the incomplete pellets lack vitamin D3 (which cannot be found in any naturally-occurring food thus providing fruits/veggies does not fill in the gaps).
Incomplete pellets often have recognizable ingredients lists that make us feel better about what we are feeding our birds. Incomplete pellets rarely mention this in their advertising… So, if you choose one of these pellets, just realize that you must supplement your bird’s diet daily (usually with DAILY natural sunlight or a lamp to provide D3, but check with your avian vet to confirm what vitamins/minerals are lacking in your specific incomplete pellet). Examples of incomplete pellets include TOPS.
Complete pellets provide a base foundation all essential vitamins and minerals. While it is still healthy to provide fresh veggies and natural sunlight on a complete pellet diet, you don’t have to stress if you miss a few days. The ingredients list of complete pellets is often less wholesome-looking with difficult to pronounce ingredients, in order to provide the full vitamin/mineral profile. Examples of complete pellets are Roudybush and Harrison’s.