I agree with NJ Deer. I too have always pheasant hunted without a dog. Sometimes a go to clubs with friends with dogs and meet up with nice guys that are looking for a hunting partner in the field with dogs. I have found that I sometimes find birds before the dogs will.
I would also suggest that you keep your eyes open. Look everywhere: in trees, brush piles, rock piles, under ice in swampy areas, they can be anywhere. I have found pheasants in the strangest places. Also, don't be afraid to shoot them on the ground. Remember, there first instinct is to run. Without a dog chasing them, they may not fly.