Our first goal is to feed the animals we raise using on farm resources (grass, nuts, hay, browse). After that, we have to bring in feeds for them from off farm. When we do that, we prioritize byproducts over original products (wheat middlins instead of wheat, spent brewing grains instead of barley)
All these are subject to our review, but we something got by us. One of the byproducts we feed is tart cherry.
We have fed it, intermittently, as a small part of the diet (<2%) for awhile. Awhile ago I called the tart cherry association and checked it for pesticide content. They assured me that though sweet cherries are on the "dirty dozen" of food, tart cherries receive almost no pesticides and are washed (nearly all "cides" are water soluble) before sale.
They failed to mention the product I got was mixed with conventional gmo corn syrup. In retrospect not surprising since that phrase doesn't scare enough food scientists yet.
As to the extent of the damage, its been a small part of their diet and fed primarily to the young, not to older market size animals.
Thanks for understanding and good luck in your ow pursuit of clean food.