GrizzlyBear:
Give careful consideration to training your lab for deer recovery. If that is solely what you intend to use the dog for, great.
But if you plan on using it for upland & waterfowl hunting, I would strongly suggest you not train it for deer.
Reason I say this is because labs have an exceptionally strong desire to please their master..... and once they figure out what you want them to do, they will try their darndest to keep on doing it. That is why they are so readily trained for so many different jobs: Hunting, seeing-eye dogs, drug dogs, search & rescue, & cadaver dogs.
Once that dog figures out that you want it to find deer, it will bolt on you every time you're afield & it comes upon fresh deer sign, and that happens quite often when upland & waterfowl hunting.
Any dog is going to get excited if you jump a deer: the scent, the commotion, & just plain curiosity. But if you tell the lab "no" when it does happen & tries to give chase, is will learn very quickly to ignore deer (and rabbits, squirrel, etc. as you encounter them).
Again: if you are acquiring the lab just for deer recovery, then I'm sorry for the long-winded rant. But if you intend to hunt with it, my advice is to forgo the deer training because you'll more than likely regret it down the road.