As in Christianity, there are many "branches" of Islam, e.g. Sunni, Shia, Ismaili etc., and often there are differences between the different sects on topics. Generally speaking, though
all the prophets including Muhammad, taught that animals are part of God's creation should be treated fairly and compassionately. Unfortunatley, this is not always the case; people get off the "straight path" or follow old cultural traditiions.
http://en.wikipedia.org/wiki/Islam_and_animals