Feeding pig?!
Answers: will feeding a pig only water for two days before it is to be butchered for pork enough and will it lose a lot of weight?
It will digest more body fat during that time, so you will have leaner meat (it will not lose muscle weight in such a short time, just excess fat). So, that's up to you. The water will flush out most toxins if there are any. If it's a free range pig, spoil it with fruits and veggies, so it can have a happy ending. Animals that are able to walk and run around more have leaner meat and less fat than animals kept in pens.
ofcource, what will happen, do you think otherwise?