From my Intensive Animal Farming: Wrongs & Responsibilities paper:
Completely eliminating the consumption of animal products is neither a viable or desirable option for Muslims, since animal sacrifice is involved in several religious rites and occasions. Additionally, moderate consumption of meat is a Prophetic norm (Sunnah). So one really cannot make a case that the Sacred Law calls for vegetarianism or that it is in line with the Sunnah. Instead, something must be done to ensure that our consumption is within the limits set by religious norms and sound medical advice, and that the animals we consume are raised according to the Sacred Law.