Found the list of treats, and on it there's a link to the toxic plants. Garlic and onions are on it on account of the sulfer. I have also seen not to feed citrus, because they don't need vitamin C, their bodies make their own. It IS recommended other places for extreme hot and cold though.
Idk, i guess everything in moderation.
https://www.backyardchickens.com/a/chicken-treat-chart-the-best-treats-for-backyard-chickens
Idk, i guess everything in moderation.
https://www.backyardchickens.com/a/chicken-treat-chart-the-best-treats-for-backyard-chickens