Commercial meat

There is medical and scientific studies that prove undoubtedly birds do die from stunning, if this is accepted as a medical fact, & considering that this practice of stunning is in vogue in ALL commercial meat production and in the absence of any equipment to verify and accurately separate & remove the carrion, Will the meat remain halaal, haraam or makrooh on account of a unknown number of carrion mixed in inevitably , or what is the Shari Ruling & Directive regarding this type of produce ?