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.