Chiming in because, sadly, I have dealt with this before... But remember that ultimately every dog and situation is different.
I have a Husky-Great Pyrenees mix named Freya. From the time we brought her home at 8 weeks old, she was around my chickens. Never had a problem until she turned about 11 months old. I had a chick (6-8 weeks old) get into our fenced backyard. Freya chased and caught it. She was carrying it around, alive, in her mouth when I realized she had it. I took it away and it was unhurt. A few weeks later, she got another chick... They were small and getting through gaps under the fence. Anyway, she killed the 2nd one and ate half of it. When I tried to take it away, she growled and snapped at me (resource guarding). From that point forward, I assumed my chickens were no longer safe around her. If one managed to fly in the backyard, she would routinely chase it. I always managed to intervene and she never killed another.
However, when Freya turned 2 yrs old, things changed. She no longer tried to chase them if one flew in the backyard. This December, she will be 6 years old. She doesn't chase or show any interest in my chickens UNLESS she is transferring her frustration because of something else. For example, if she sees a stray cat or dog or stranger close to our house and she can't get to it, she will redirect that frustration on anything else around, including our other dog - Odin - or any nearby chickens. If they are even close to the fence, she will charge them. But only as redirected frustration... Otherwise she completely ignores them.
So ultimately I think her earlier behavior with chasing and killing my chickens was primarily PUPPY RELATED behavior. Since she was corrected whenever it happened and routinely told afterwards to leave them alone, she has ultimately grown out of that behavior...minus the exception which is normal (albeit unsatisfactory) dog behavior.
If Whiner is displaying puppy behavior, there is a chance it can be corrected and grown out of... But it's a long, slow process you have to be prepared for.