i purchased two ducks that i was told were runner ducks, a blue one and a chocolate one.i am pretty sure the blue is a runner duck by the way it walks & i think it's a male, but not sure on that....the chocolate one doesn't walk upright like the blue one and has a blue/black band on it's side & i think it's a female, not sure on that. i'm thinking the chocolate one may be a khaki campbell? any help would be greatly appreciated. thanks.