There is no one straight answer to this question. It depends on different factors, such as your pet's size, the species, and the parrots' eating preferences. The best way to ascertain this is to watch your bird understand how much food he or she is eating and how much is discarded daily. If your pet bird has been maintaining the ideal weight for their size, you can be confident that you are feeding them the right way. Some parrot parents go by the serving suggestion at the back of the food packets. However, this might not be the right approach, and the advice is based on estimates and not facts. The best way is to observe your bird's eating habits and decide how much to feed them.