Thanks, I looked it up: https://www.smithsonianmag.com/smart-news/eagle-who-thought-rock-was-an-egg-finally-has-a-chance-to-be-a-dad-180982034/

This made me curious, and apparently male eagles play a large part in caring for the young! They’re the primary hunters for the first 4 weeks(with the mom becoming the primary later on), primary nest guardians, and develop a brood patch alongside their mate, though males patches are smaller and still more feathery.

Sounds like that little chick was in good wings.

He’s been fostering another chick since May or June!