Thanks everyone, it went well. They were actually only 6 days apart, so while there was a noticeable size difference between our biggest and smallest (Brahma and Wyandotte). The Wyandotte was pretty assertive immediately.
everyone is getting along fabulously.
my guess is the Wyandotte will...
I know it’s advised that when you bring new birds into the flock, you are supposed to do it gradually (for example putting them at night while roost).
But what 2-3 day old chicks with 1-2 week old chicks, any fear there?