Can other bird/poultry species share the same brooder as chicks?
Yes they can when there is plenty of space but it isn’t recommended. It is important to keep waterfowl separate from chickens and turkeys (behavior, size and sanitation are the principal reasons) and you should keep chickens and turkeys separate for disease issues, but many people successfully raise them together some broody turkeys will raise chicken chicks and some broody chickens will raise turkey poults.
