I always chuckle at people who claim that the halal slaughter method is the "cruel" way. Do you think that in traditional slaughter houses the lovely fluffy lambs are sung lullaby's whilst lying on a bed of roses awaiting their injection to be PTS?
Halal method has strict rules for animal welfare and if followed correctly ensures that the animal does not suffer. eg the animal must:
be fed/watered on the day of slaughter (this is often frowned upon traditionally as it makes the stomach harder to clean)
no animal should witness another being slaughtered
the animal should not see the knife
the one who is slaughtering should be properly trained to ensure that it is a swift cut in the correct place
the knife should be very sharp so that the jugular vein is cut easily
Within a fraction of a second of the jugular vein being cut the animal loses conciousness. It does twitch a bit for a minute as the nerves react.
I have seen this done before and didn't find anything cruel about it.
However anyone is free to boycott anything they want.