Ok, your rooster is just now starting to have his hormones starting to kick in. He is really a bit too old to be with pullets who are a month younger, since at this age, he is starting to become active, mating-wise, and the pullets are still babies. So, this is not a rooster, but a young cockerel.
I wonder about what picklebird said, that the pullet wasn't a pullet at all but a young cockerel.
I wonder about what picklebird said, that the pullet wasn't a pullet at all but a young cockerel.