Muslims eat meat only when prepared according to a method described in the Koran. The killing of animals for this purpose is done by cutting their throats and bleeding them. Through most of the Muslim world, this is done with the animals live and conscious. Muslim clerics have always claimed that the animals do not feel pain in this process.
A recent study was reported in New Scientist.
http://www.newscientist.com/article/...slaughter.html
Animals were anesthetised enough to prevent consciously feeling pain, but to a small enough extent to allow pain signals to pass through nerves. They had their throats cut according to the Muslim tradition, and pain signals monitored. Results were clear cut. Animals killed by the Muslim method feel intense pain. The process is inhumane and should be stopped.
It is quite possible to stun animals with an electric pulse before throat cutting to permit Halal killing with no pain to the animal. This should be done.