Anyone have an answer to this question?  Why is breeding an issue at altitude?

From what I understand pheasant eggs need a certin level of oxegen saturation in order to hatch properly.  I know that when pheasant eggs are hatched in a incubator at high altitued they add oxegen to the incubator.    This is just a guess, but I would think that it's not that pheasants can't live at high altitudes, it's just that the eggs don't get enough oxegen to hatch properly.  Just my two cents. 

Do a lot of guys raise their own birds and just releae them on to their property? 

I have never raised birds from eggs, but a few years ago I purchased 200 Chuckar chicks with a frend and we raised them in a small flight pen.  It was a great way to get my young dog on a ton of birds and in my state chuckar are not native species so I was able to get a dog training permit for around $20 and take the birds to a friends farm. 

Jeff B.