Interesting thread. I'm far from a dog expert. I've only owned 3. I haven't done anything special, but all 3 ended up being very good at recovering wounded pheasants. For what it's worth (right or wrong), I do have thoughts on the subject:
1. One dog will never teach another dog how to hunt pheasants, recover them, or retrieve them. In fact, if an experienced dog dominates in the field, it can be a detriment to a younger dog, or at least slow its progress.
2. Experience is everything. I hunt quite a bit, so my dogs get what I'd call a lot of experience with wild pheasants. When they're quite young, they have to learn that finding a wounded pheasant is their job (when you say fetch, dead, find it, or whatever) & that it makes you immensely happy when they DO find it. If you make a huge deal out of finding a bird, I think they'll grow to love it & work harder at it.
3. Even the best pheasant dog will lose a bird now & then, & it's rarely, if ever, their fault. But in the case of my 3 dogs, if I'm patient, he'll recovery the bird much more often than not. Patience isn't always easy. You're frustrated by a poor shot maybe. You hate losing birds. It's taking time. And allowing a dog to search 5-10 minutes can feel like 30 minutes. I've been there many times. My guess is some people & dogs would benefit from more patience. Just stand there as long as it takes to figure it out. Then lay on the praise ultra heavy when they find it.
Just yesterday I made a miserable shot & scratched down a rooster in some cattails. Cows had been in there, so there were tons of beaten paths for running. There'd also been other pheasants in there, so I'm guessing there was plenty of scent to contend with. Ace raced around for awhile, but eventually acted like he was starting to figure things out, exactly where the bird had fallen, & which path he took from there. He came up with the bird maybe 40-50 yards away on about the 3rd time he basically took the same route "over that direction". As I stood there, waiting, it felt like about a half hour, but probably was no more than 5 minutes. What I do know is I had zero clue where that bird had gone, so I was no help. And Ace looked awfully proud of himself bringing that rooster to me, so once again, I let him know beyond doubt that the magic he'd just performed made me EXTREMELY happy.