Mine start whining when I give them treats, some sound like accordions and one even sounds like an eagle or old fashioned kettle. I got a vid of them doing it and it is quite adorable. I have searched for whining chickens on YT and never seen anything regarding this. These birds make some crazy sounds, they even purr/trill when cuddling me, one another or sun and dust bathing. They are about 3 month old now, Little Peep-Peep is defo a rooster due to his wattles and comb coming in, and one looks like a hen with the big pom-pom head, while the other 3 are ambiguous. Other than the occasional kick-boxing they do with one-another, even the hen-looking one, and scuffles over treats, they get along fine.