My mother called me up and asked " Do you want 4 ducks and a guinea" kinda a vague question but I answered " free ducks and a guinea, or I pay for them ducks and a guinea?" well turns out that a woman she worked with bought some for Easter and couldn't handle them as they got older so she was looking for a good home on a farm somewhere. so long story short I got some new editions to the flock today. funny thing about this though........ I know nothing abut ducks or a guinea for that matter. so is it okay to run them in with my chickens even if they are only 15 weeks old (5 weeks younger than my chickens).