livestock guard dogs (new puppy killed a chicken)

Hi I just got a Great pyrenees / German shepherd puppy 5 days ago. She is calm and follows me everywhere. When my sister came over for a visit with her kids. One of the girls came into the house to tell me that Anna (my new puppy) was missing .I went out to look for her and, I fund her with a dead chick in her mouth.
I don't want to get rid of her but do you think I should.
After this event happened I put the chickens in a chicken pens where the puppy can’t get to them. I have been bringing her into the pens and if she bites at them I say NO very loud and give her a smack. I have been doing this for 3 days now and she doesn't care about the chickens any more she just lays there and choose on a stick. I have her on a short leash when id do this.
What do you think I should do?

I have always had dogs that were some kind of a German shepherd mix they work grate. I have an older dog that is German shepherd/ Australians shepherd, she is 6 years old and never killed a chicken even when she was a puppy. Anna stays with her when I'm not outside.

Your dog is just a puppy, it needs another year and a half or two to mature and learn what it's duty is.

Unsupervised Puppies and chickens are not a good mix, usually the chicken(s) loose!

You need to continue training on the leash ... One mistake is no reason to get rid of the dog, but a reason to be more aware of where the puppy and chickens are.

123RedBeard said:

Your dog is just a puppy, it needs another year and a half or two to mature and learn what it's duty is.

Unsupervised Puppies and chickens are not a good mix, usually the chicken(s) loose!

You need to continue training on the leash ... One mistake is no reason to get rid of the dog, but a reason to be more aware of where the puppy and chickens are.

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Agreed - she's just a baby and still has much to learn.

All dogs have the killer instinct, even great pyr and GS crosses. If your puppy is still attacking after its 8 months old, then it is probably something that is not fixable. But she will probably learn very soon from your training that the chickens are family and will protect them. Spending time with her and the chickens is the best way to bond. We have a great pyr mix we are still training him to not invite the chickens in the house. Good luck!