I know nothing about jungle cock chickens, but I'm guessing they are not good for much other than feathers for fly tying.
Quite a few years ago before dun necks were available I had access to a farm and bought some chicks I thought it would be a win,win,win for me, necks, saddles, eggs and the chicken when I butchered them.
Maybe somebody or something was taking the eggs but I never got a single egg, and as far as the meat went you could cook them for 4 hours then take them outside and play basket ball with them, toughest damn chickens I ever had.
Wondering why Whiting never raised any of them ???