I am concerned to see that about 5-7 out of 15 hens have bumps all over their combs. One of my hens has it on her comb, face, and wattles. A different hen has dark tips of her comb. What is happening and should i be concerned? I noticed it about 3 days ago and i feel like it has worsened and every day at least one more hen has it. Thanks in advance.
Here are some pictures:
Here are some pictures: