To ensure your birds stay healthy and grow well, there are key things you must do regularly.
It is important that you learn how to catch and hold birds securely and safely. A quick feel of the breastbone for muscle will let you know if your birds are losing weight. Also, check regularly for parasites such as mites or lice and isolate and treat sick birds immediately. External parasites such as these are easy to notice.
Understand symptoms of common diseases and quick-fix remedies. If you can't handle a situation, invite a professional for help.