To this very day Watchtower persists in teaching its utter nonsense that transfusing blood is eating blood. Take a look at what Watchtower says in its 2014 convention release: http://marvinshilmer.blogspot.com/2014/07/transfusion-eating-is-still-canard.html
Ironically, the very fraction ("serum") Watchtower spoke of in its response to the R. Jensen letters is demonstrated to be a blood fraction which transfusion of actually does offer parenteral nutrition. But Watchtower never lets whopping details like this stand it the way of what it wants to tell folks. See: http://marvinshilmer.blogspot.com/2012/10/watchtowers-expert-on-blood-transfusion.html
Watchtower assertion about Denys is wholly wrong. Denys never said what Watchtower alleges he said. See: http://marvinshilmer.blogspot.com/2013/02/academic-deception-or-incompetence.html