Because she is calcium deficient; when I brought her to the vet the doctor mentioned an indicator of her skeletal structure compensating for the lack of proper levels.
BarAle organic layer feed, crumble. They have scratch every evening before bed. I also put oyster powder on their food for calcium.
They are both free-range.
Sometimes my rooster jumps the fence and eats a little cat food, but I always catch him early on.
I live on the far-left side of the US.
I only have a rooster and a hen, and my hen is very well mannered toward my rooster. The lesions are spreading to each tip of the comb, along with the mentioned feather loss on the top of the head.
Previously I had another hen in the same flock who passed...
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I have two chickens, one rooster and one hen. They both are free range. The rooster is around 1 and a half years old and my hen is 2 or 3 years old. They are both healthy weights.
Both birds have shown behaviors of shaking heads, itching ears, sneezing, and yawning...