I found this related QFR the other day. I remember jws being told they would not eat meat after Armaggedon. I note that the WTS merely surmises, guesses. I always wondered why Abel felt he could kill animals for sacrifice and how he knew what God requires since the pre-bible account says nothing.
*** w51 2/1 p. 95 Questions From Readers ***
Concerning the eating of animal flesh after Armageddon, would not that be determined by the everlasting covenant Jehovah made with Noah after the Flood, rather than by the edict given to Adam in Eden?—C. N., Texas.
If man does eat flesh after Armageddon, the terms of the Noachian covenant will apply. Its regulations regarding the disposal of the blood of animals killed for food will last as long as the practice of eating such flesh lasts. In considering a related question in this section in its issue of October 15, 1950, The Watchtower said concerning animals in the new world: “It appears that men will not kill them for food.” The statement is not dogmatic, but goes on to show that it is reasonable to expect Jehovah’s original purpose relative to food supply, as given in Eden before man’s fall, will be ultimately realized in the new world.—Gen. 1:29, 30, AT.
The covenant with Noah allowing animal food merely made provision for extra food, highly concentrated, for deteriorating mankind. This provision also made way for post-Flood sacrifices to be made of which the sacrificers could eat part of the flesh, such as the Passover lamb and other sacrifices in Israel. It also laid the foundation for Jesus to speak about his followers’ eating his flesh and drinking his blood, to gain life in themselves. But such provisions were not originally made for the perfect man and woman, and there would appear no absolute need for mankind uplifted to perfection to include animal flesh in his diet. Just how soon after Armageddon any elimination of meat from man’s diet might take place we cannot say.