Is this a safe plant to feed to chickens? Help ID for food

[Beldenfarm]

Can someone help me ID this plant/ is it safe to feed to chickens for supplemental greens? It is growing wild in my garden and I would love to give to chickens and not waste it! Just don't want to feed it to them until I know it's not poisonous.

Thanks!

 

[wyoDreamer]

Where are you located? What state are you in?