Because skinning is not a condition

Q 3: What is the ruling on eating the meat of a cow or a sheep or any other consumable animal which are found lying motionless and whose blood flows at the moment they are slaughtered, yet no bodily movement is made? Is it true that movement of the body at the moment of slaughter makes a slaughtered animal lawful to eat? (Part No. 22; Page No. 489

A: injured eatable animals which are not yet dead are lawful for eating after they have been Islamically slaughtered. Though Allah (Glorified be He) prohibits eating animals killed by strangling, or by a violent blow, or by a headlong fall, or by the goring of horns, exception is made in case such animals are slaughtered before they die. Allah (Exalted be He) says: ...unless you are able to slaughter it (before its death) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.