Just because a bird can survive in such a setting, it does not mean that is the most ideal setting. They definitely should not be housed together since the chances of them getting sick goes up since they have contact with chicken feces, which would be the case with what MedicalPrepper inquired about. I am not sure what pheasant species you have but when you start raising pheasants and have some expensive, rare ones that are hard enough to raise, you should not be taking the risk housing them next to chickens. That is how I am, so I no longer have any chickens since I did not want my ornamental birds getting sick from them.
Edited by quackers57 - 8/21/15 at 2:40pm