First and foremost you didn't say it was from montenegrosarp. Second, you started this pup completely wrong for lgd work. The proper way to do it is have an adult lgd, bring the pup in to learn the ropes and when it is a proven safe dog you leave it loose. 3rd, if you saw her chasing and killing stock, serious measures should hve been taken to ensure it wouldn't happen again. People in the old country would wield a shovel, brick, chain or any stick they could get their hands on in accomplishing this. Or they would have just killed the dog for costing them livestock. I'm not saying best her, just letting you know how it was fixed by those who had these dogs before you ever got one. Just because your dog has lgd instincts doesn't mean it will follow them. You still have to train it to do what you want.