First of all my biggest pet peeve. Unless your dog is at least 1/2 of an actual LGD breed. IT IS NOT AN LGD! If they chase something away especially labs, it's usually because they either want to play or investigate. And this is what I have learned and what dog trainers have told me. And experienced dog people.
I have an LGD from the day we got her you could barely drag her back into the house because she just wanted to sit out there and watch them. As a 4 month old puppy!!!!
My relatives had a lab and who they adopted, they've had hunting dogs their whole life but decided they wanted to adopt a lab after their previous one died. The lab they adopted had been through 4 different homes, been abused, and like most hunting dogs never properly trained. They wanted to get some ducklings, and chickens, and so the day they came to get them they brought him. My LGD was out there by my free ranging chickens and we were watching the ducklings outside. Suddenly the lab grabbed one of the ducklings in his mouth! My cousin and I reached for his collar pulled his jaws apart, and said no and gave him a good whacking on the nose. No I don't consider this abusive and the fact that he has never touched a bird again proves that it worked.
Once a dog has tasted poultry it's pretty hard from getting them not to do it again. There's the chicken and collar method, which I've heard is effective but your dog may stink
My LGD will be turning 4 in March 2017. She is 1/2 Great Pyrenees, 1/4 Border Collie and 1/4 Australian Shepard. She sleeps outside in our North Dakota winters, cause what's the point of having one if it sleeps inside. The day we got her she was 4 months old, I had my first poultry 2 Pekin ducklings about 2 months old. She trotted away from us and sat down by the cage they were in. We literally had to drag her away. Every night she goes down and checks the animals, she was never trained to do this. There's many other things she does. LGDs are very smart also, I had set a trap in the spring just to thin the coon herd down and my dad got to the trap first, he knocked on the kitchen window and I said that's Shadow, my cat, he agreed, but the whole time our LGD was throwing a fit! Barking and growling when my dad opened the trap up that cat ran like I've never seen a cat run before! Turns out that was not my cat. Since she's also half herd dog she works really well when we put our cattle between the cattle guards. She knows they cannot be in our driveway or yard so when she sees one she chases it out.
If you are looking for a dog and you have poultry or any livestock I recommend an LGD they are great family dogs but also very good with animals.
EDITED: Be prepared to pick our porcupine quills and have the pungent smell of skunk on your LGD though
