Hi! Ok so here goes...someone has to have tried this
I have a mature free range chicken flock with two resident roos. This year I want to give guineas a try for tick control etc etc. Online is full of both yay and naysayers for keeping guineas and chickens together but from what I can tell, if you raise guineas with chickens (roos incl.), they do not become aggressive towards the chickens as they get older because the chickens imprint on them as "normal" and "non-threatening". So unless I hear some excellent cases otherwise, that will be my strategy - I am going to socialize the guineas from the start with other poultry.
My main concern (and question) is for the safety of the guineas when adding them to a mature chicken flock. For example, I can add cockerels and pullets to the flock (in numbers so no one gets overly picked on) but will the established roos/hens view this new species as a major threat and kill the younger guineas? I've heard stories of chicken hens picking apart younger guineas though there may have been spacing issues...and the guineas did sound like they were too small to go in with bigger birds. So 1) Will it be ok/safe to introduce a good number of adolescent guineas to a mature chicken flock like I manage to do with cockerels and pullets? or 2) Is it better to start a second flock, keeping the guineas exclusively with the chicken chicks that they grow up with? I look forward to hearing about your experience(s) and for any advice. Thanks!

I have a mature free range chicken flock with two resident roos. This year I want to give guineas a try for tick control etc etc. Online is full of both yay and naysayers for keeping guineas and chickens together but from what I can tell, if you raise guineas with chickens (roos incl.), they do not become aggressive towards the chickens as they get older because the chickens imprint on them as "normal" and "non-threatening". So unless I hear some excellent cases otherwise, that will be my strategy - I am going to socialize the guineas from the start with other poultry.
My main concern (and question) is for the safety of the guineas when adding them to a mature chicken flock. For example, I can add cockerels and pullets to the flock (in numbers so no one gets overly picked on) but will the established roos/hens view this new species as a major threat and kill the younger guineas? I've heard stories of chicken hens picking apart younger guineas though there may have been spacing issues...and the guineas did sound like they were too small to go in with bigger birds. So 1) Will it be ok/safe to introduce a good number of adolescent guineas to a mature chicken flock like I manage to do with cockerels and pullets? or 2) Is it better to start a second flock, keeping the guineas exclusively with the chicken chicks that they grow up with? I look forward to hearing about your experience(s) and for any advice. Thanks!