My Calls are not obese..lol....They are Calls...I put down 4 lbs...Probably more like 3 lbs...Mine are not show standard Calls..Cute little Ducks..I have a white Hen and a Mallard Call Drake...So cute!
I have two 4 lbs Calls and four standard sized Ducks...They hate my Chickens and visa versa...The Ducks were raised in the same coop with my Chicks but never allowed to run free together because as Ducklings they really wanted to chase the chicks...
All you really can do is try it and see if it...