I have a four-year old Speckled Sussex hen who crows. Actually, two. She has taught her sister to crow, and they both do a fair impersonation of a rooster, complete with crowing posture. But these girls did not crow as pullets.
Currently, I have four eight-week old chicks. Two are Silver Cuckoo Marans. One of them crowed for the first time today, an unmistakable adolescent cockerel crow. It sounds like someone trying to gargle. But it was a far cry from the peeping that all four chicks continue to do.
I've heard many young cockerels learn to crow. They all sound exactly like this Marans. Up until today, I was supposed to have four pullets. Now I realize I only have three.
Upon close inspection, my two Cuckoo Marans have different colored combs and wattles. The pullet has a pale yellowish comb. The cockerel has a pinkish comb. Examine you "crowing pullet". How does "her" comb compare in color to the others? Chances are, it's more of a pinkish, reddish hue than the pale yellowish fleshy color of the other pullets.