If you plan on hatching with a broody chicken, you better have Super BIOSECURITY measures in place. Chickens can carry diseases that they can tolerate but will kill a pheasant and other gamebirds.
Cross contamination is easily overlooked, washing hands, changing clothing and shoes before entering pens or handling birds, feeders, waterers, etc and not allowing visitors to be in your enclosures will help lower the risk of transmitting diseases.
I don't raise chickens anymore due to the above statement. Even with no chickens present, I still practice a very high level of BIOSECURITY!
It's also the reason I prefer to hatch my breeder birds, instead of buying adult breeding stock. Yeah, it's probably cheaper to buy the adult stock versus buying hatching eggs but since hatching from eggs (20 + years now) I haven't had any sick birds and don't have to worry with quarantining, which can have the possibility of transmitting disease via air borne illnesses. Just my 2cents.