I have a Schnauzer/terrier mix pet but we have a predator again and I am wondering if any one thinks that she is too old to train to guard outside the chicken run? She would tear my birds to bits if she could get to them so she has never been near them. She stands and stares at them like she's in a trance and can't hear me talking or calling her. I am considering putting her out in the run at night after the chickens have been put up but sometimes they don't all go in the coop, sometimes they hide under the coop. If they were to come out while she was in the run they would be nothing but feathers by morning. If I just let her run loose in the yard she would run the neighborhood so I would need to find a way to tie her to the outside of the run but in a way so she could circle the run. Also, she has always been an inside dog so I am not sure if I should even consider putting her through this at her age. Any ideas? Thanks.