Dog too 'playful'

I have a puppy(around 2 years old) who seems to think anything smaller than
her(she's a mutt who is like a medium sized dog I'd say) that moves is a toy
to be chased and such, like the chickens we have(we recently moved and at
our old place the chickens had free run of the backyard, but they're staying
in the coop at our new place since there are wild dogs and other predators
roaming around who already got our male goose). She knows it's bad to go
after the chickens, but that doesn't stop her from trying to do it if she
has the opportunity. Our other dog we had never had a problem with chickens,
she would be in the backyard and just ignore them. Is there any way I can
help my dog to understand that the chickens are part of the family unit and
not 'toys' for her?

flick...

I would make sure the dog didn't have the opportunity to get close to the
chickens, which is basically what we do here. The chickens are penned. The
dogs are fenced and not allowed to run loose. We tried loose chickens and
fenced dogs, but chickens are dumb and we lost a couple when they decided to
fly over the fence into the dogs' yard.

For ease of care, the chickens aren't far from the house, and the dogs can
kind of see them and surely smell them. This caused some problems at a weak
place in the dogs' fence, so I added a hotwire (electric fence) on their
side at chest level. After a short period of time, they got used to the
chickens being out there, too. They'd get 'em if they could, but they
can't, so oh well seems to be their attitude.

An added benefit, with them fairly close to the dogs and the house, no
losses to predators in 3-1/2 years. Coons and such don't want to pass close
enough to Those Evil Canines to get a meal, I think.

I've read many stories of farm dogs that are nice to chickens, sometimes for
years, and then start killing them, and I decided we would keep them
separate from the get-go. Plus, dogs that wouldn't hurt the animals on
their own property will sometimes wander and kill the neighbors' livestock.
It's best to confine/control your dogs, even out in the country.

Our arrangement is a couple big fenced yards that surround the house, with
dog doors into the house. I have never assumed that the dogs needed to be
able to freely wander the whole acreage, or that I needed to dog-fence the
entire property, which would be expensive and difficult. I would also be
concerned about my dogs being unprotected against a predator that killed a
goose. I've had geese, and I've seen them run off marauding dogs.