Our dog is a shiba inu German shepherd mix. We got chickens about a year after acquiring her and have kept her on a chain while they free range. Last year she broke her chain and killed 11 and has also (in the beginning) maimed a rooster and killed a hen while on her chain. She has never eaten any, just killed and buried. The chickens often get close to her to try and eat her food but she no longer tries to attack them. I know this sounds like a long shot, but she no longer seems interested in the chickens. I would love for them to live in peace without barriers. Is there something I can do to test whether or not she is "safe" to be out with the chickens (without putting them in danger)? Do you have any experience with dogs changing or are they pretty much chicken enemies for life? Let me know if my thoughts are totally unrealistic. Thank you!