Wow Awesome job hatching that baby! How kind were you to try to save that one last egg!
It is sorta odd looking, the face is wrong for a chicken I think, you said the egg was brown? There were on the ground? I could not find colors of pheasant eggs but found a picture...of a baby pheasant on the wiki that looks alot like it.
http://en.wikipedia.org/wiki/Common_Pheasant. here is a site of a family raising them too maybe some help there
http://www.squidoo.com/pheasants
A large cardboard box would make a fine brooder for your baby, just give it room to get away from the heat. Also maybe something to crawl under, either a washcloth "mommie" propped up or a stuffed animal. will help it feel more secure, all alone in a box.
It it looks like the pictures on the Wiki I would call your local wildlife rescue folk and see if they can suggest what to feed it. I know in CA here they used to not let people hand raise wild game birds, but that was years ago. I remember Fish and Game coming to visit us when they learned we had rescued a clutch of quail eggs. Once they saw they were safe and we intended to let them go when grown, they let us keep them.
You may be feeding it meal worms as it grows up....YUM! We always fed rescued or found baby birds a runny mix of baby cereal, but I imagine the same could be done with starter mash, just to get something in him. Water is the most important. But like others have said you have a day or so....
Cannot wait to see it all fluffed out...Totally subscribing to this thread....
You did a kind and thoughtful thing... Wouldn;t the world be a better place if everyone stopped to try to save one little creature (or egg) in distress....