I did quite a bit of research before adding Ginger to my wellness blend. I knew Ginger was good for us humans but had to make sure it's good for poultry and goats as well. I found this article by Dr. Zhao. He found that hens supplemented with ginger powder started laying eggs with a greater mass and also found a higher amount of antioxidant in the egg yolks.
Dr Zhao concludes by claiming that the ‘optimum’ amount of ginger powder for laying hens is between 10-15 grams per kilogram of feed. here's a link to the article