1: have them meet face to face
Make sure that they are between a structure, such as a upside down basket. Let them get used to each other.
2: trust your dog
When you think he is ready, let your dog encounter face to face without any barrier. Make sure you hold your chick. Repeat this until step...
My two straight run chicks are now 5-6 weeks old- before modeling my coop, I need to know the genders of the two. Moose (light brown/tan color) is A Buff Orpington, and is usually always chasing and pecking Quill (Dark Brown with black) The Sicilian Buttercup.