YUP it's true
i study Food Engineering and that is called MDM (Mechanically deboned meat)
and from that they make sussagges (or however that is spelled), nuggets, even ham
so you may think ham a nd sussagges are made from pork meat, but the true is that it has only a small ammount of it and the big part is this MDM and pork fat
BTW that "deboned" meat is like... everything: feet, eyes, lungs, genitals, ass, all bones and all the things from the chicken you dont see in the supermarket (breasts, wings, legs)
Disgusting but true.. im cool with it.. i mean.. if were living in the jungle i wouldnt mind eating all those things
and as for the Nuggets are made mostly from Starch
Tacobell, McDonnalds and other restaurants use a similar method to make "cow" meat... but the bones are not icluded as far as i know