Can I join in this thread? We are about an hour NW of Pittsburgh and have 4 black australorps (3 weeks old - we hatched out), a 3 week old mystery chick that was supposed to be a RIR, 3 Rhode Island Reds (4 weeks old, bought a week ago), and a blue cochin (also 4 weeks old, bought with the RIRs).
We have two kids, 6yo and 3yo who adore our chicks although they have trouble being a little rough with them (mostly the 3yo). We also have a medium-sized dog, a Pembroke welsh corgi. The corgi did really well with our week-old hatchlings, but now that they have feathers she's been getting more excited when they start running around. *I was also out of town for a week so she was home with just my husband and didn't get any contact with them, then I came home with 4 new chicks so I don't know how much that had to do with the change. She only tries to sniff them and she's all smiles/tail wagging... no aggression there at all, but when they start running and wing flapping she gets excited and wants to play and give chase. They are in our living room in a baby pool surrounded by a portable dog fence so she can see/smell them all the time. My girls get chicks out to play with on the living room floor throughout the day and the dog is mostly just curious. We have a little chickie run in the yard to take the chicks outside on nice days, the girls go in with them and I've let the dog in there (leashed) with me for 'training'. I let her walk around and sniff, but have her sit or lay down if she starts to get excited. Anything else I can do to help her learn that she can't play with the chickens?
Honestly, I don't see them ever free-ranging with the dog actually, despite having a great yard for it (almost an acre, backs up to a stream & woods). There are many dogs in our neighborhood including 2 directly next door which are often unleashed and would likely kill our flock at the first opportunity.