Do cows feel pain when slaughtered?

Online Answer
Not a lot of people know this, but in most cases it's actually illegal for cows and pigs to feel pain when they're slaughtered. In 1958, Congress passed the Humane Methods of Livestock Slaughter Act, which set slaughter requirements for all meat producers supplying the federal government.
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Given the variation between different production systems, breeds and regions the age of lambs at slaughter varies widely from as young as 10 weeks of age to over 12 months but it is assumed that on average a UK lamb will be between 6 and 7 months old when slaughtered..
Cows and pigs, animals of great weight, are lifted from the floor by their rear legs, causing them tears and breaks. After that, they are slaughtered by the killers, their trembling bodies can be extended endless minutes.
Chickens are exempted from the USDA's Humane Methods of Slaughter Act, which mandates that animals be rendered insensible to pain before being slaughtered.
Today, the animal is rendered unconscious by electrical or carbon dioxide stunning and then immediately bled by cutting the throat. For quality reasons, mechanical means of stunning such as a captive bolt pistol are not recommended although in some abattoirs they do use it and the pigs are stunned using 80 volts..