According to the most comprehensive study ever completed on kosher slaughter, headed by the renowned animal welfare expert Temple Grandin, the opposite of what is claimed by Rabbi Yanklowitz was found. According to Dr. Grandin, when kosher slaughter is performed humanely the animal remains calm shows no signs exhibiting pain or stress and dies within seconds, not minutes. Even the famous Australian study that opposes shechita never made proclamations such as those made by Rabbi Shmuly. That study’s authors did voice legitimate concern about many different welfare issues that could arise after shechita but also never brought proof for their criticisms and even failed to properly differentiate between kosher and other forms of ritual slaughter. I’m not saying that kosher slaughter is perfect and admit that there are legitimate welfare concerns involved with it but these are a world away from the scenario Rabbi Yanklowitz portrays in his post.
Additionally, the fact that we don’t use stunning in kosher plants has tangible welfare benefits. One of them being that during kosher slaughter the myriad of problems experienced when stunning animals is avoided. For instance, because of ineffective stunning methods millions of chickens are literally boiled alive each year during non-kosher slaughter. Another example, one that I witness daily, is that animals will often times need additional shots when using the captive bolt method of stunning. Some will actually seem to lose consciousness even though the shot was ineffective and then need to be shot again minutes later, and unlike in the case of kosher it is universally agreed upon by all scientists that animals in which a first shot was ineffective experience excruciating pain. Another downside of stunning is that it allows for a very fast paced slaughter operation. These extremely high paced workflows increase stress and injuries for both animals and workers while driving down animal welfare standards. My point in bringing up these examples is not to say that stunning is a universally bad form of slaughter but rather to say that it has its flaws and also that those flaws might degrade certain aspects of animal welfare of kosher plants if implemented. Simply tacking on stunning to kosher might solve certain issues but could also create others.
 Grandin, Rogenstein 1994 http://www.grandin.com/ritual/kosher.slaugh.html
 Adams, Sheridan 2008