For pheasant, the only way to go is with Bird Hunter Upland Edition (BHUE), it's made by the same guys who made the Deer Hunter series. It's about a year old now, but it plays very well. As has been mentioned, the dogs are a riot, just stuborn enough to be believeable.
Ultimate Hunt Challenge (UHC) has some very nice graphics, and it includes everything from big game to fowl, but it plays very slow on my system. After playing BHUE, I found myself disappointed with the dog's behaviour in UHC, they don't do much of anything at all.
The follow-up to BHUE is called Bird Hunter Wild Wings, and there are some screens posted at
http://www.sunstorm.net