Thanks, Fenika!
Guess that leaves out heel nippers like corgis. And shelties, too; they're excitable into their old age!
I don't think there would be much mixing, though; the chickens would be in their own fenced off part of the yard. If they and the dog did mix, it would be because someone opened the gate and the dog slipped in or the chickens ran out. In that case, we wouldn't want a dog that immediately thought, "Chicken season!"
That's good to know; I've got 3 young nephews and wouldn't want them to be constantly pecked. Yes, we would supervise them with the chickens.
There are rare exceptions to any breed, but since strong instincts have been bred in, I would start with a more likely breed.
Of course, training is always important, starting on a leash and through a fence. And keep in mind that behaviors can change. I had a LGD who was a bit timid but VERY friendly with people. I soon found out that she would DIVE for and chase rabbits. Any rabbit. Well on our evening walks we almost always came across a rabbit in this one patch of grass we walked past.
I taught her, progressively to ignore the rabbit as we went past it a few times (the rabbit didn't bolt far). I then taught her that if we approached the rabbit that she had to stay at or behind my side. Whenever she got really low and focused I made her sit and relax and we'd go again.
Long story short, in a few weeks I had her heeling, without the lead in my hand (she dragged it, something she was used to, and she knew if given permission she could run off for a ways with the lead at a gallop)... anyways, she would heel, lead dragging on the ground, and follow my lead exactly, with barely any interest in the rabbit. She'd sit and everything too.
When I moved to PA I got her pretty used to guinea fowl but didn't quite trust her with them.
I gave her to a lady with a farm and chickens.
A month later she had attacked three chickens, killing the last one
(And somehow this was all my fault. ffs. I'm a horse person more than a dog person, but I clearly understood more about dog training than this lady.)
They all got to acting like dogs -- if someone drove up into the driveway you'd hear an awful racket, look out there and there'd be the GSD, the Corgi mix, the Rat Terrier, big yellow tom cat, ducks, rooster and sometimes one of the hens all lined up barking, yowling, crowing and squawking at the interloper.
Youtube or it didn't happen!
And protective dogs are the best