Question about Irish butter

[Major Nikon]

6. I don't think it tastes any different than it always has, but some variation will occur

The reason anything tastes "gamey" is because of what the animal eats. Those flavors are more concentrated in fats of which butter is almost entirely composed.

Most US dairy cows are fed diets that maximize milk production. This will consist of varying levels of wheat, corn, and hay some of which will be fermented making digestion more efficient. They will also be fed sources of protein like soy. Cows that produce European style butter are fed diets that almost exclusively consist of foraging or hay. US cows will typically produce 2-3 times more milk than cows that primarily forage for their food.

Foraging is what produces the "gamey" flavor because of the nutrients contained in the grass. The nutrient balance of that grass can and does change with things like changes in waterfall rates or rotation to a new pasture. As such variation will occur in the finished product.