What is halal chicken?

Halal chicken means the chicken which has been ritually slaughtered and has no additives in it which are Haram.

Animals killed halal (according to Islamic law) cannot be stunned before their throats are cut, which means that many animals-including the cow shown in this video-fight and gasp for their last breath, struggling to stand while the blood drains from their necks.

Google - PETA The Cruelty Behind Muslim Ritual Slaughter