You have a pup (age?), that won't come to hand each and every time ordinarily and thought it prudent to take it out and show it game, and it wouldn't come back then either? That must've come as a terrible shock.
Without recall, 100% recall, you should not be encouraging this animal to work at anything that its going to find more appealing than your company, back to the drawing board. Food, treats, praise etc. Anyone can expect a few hiccups when entering a pup however to take out an animal whose training is incomplete or flawed is pure folly. imo.