Does it cost money to raise birds?

No charge, I have several kinds, nothing more than millet and water. I want to give birds better conditions. I want to beat an egg in the millet and fry the millet. Other birds eat red soil and raw sand, and my pearl bird eats raw sand. In addition, I give it fresh vegetables every day. Be careful not to give spinach to birds. Some birds can build nests, so they cut a big drink bottle in half and put some hay in it. These add up to little money.