So I just spent awhile looking around at deformities for chickens, and am still baffled by what would cause this thing with the comb. I have an older hen, and the back of her comb is sucked in on itself. The front 3/4 of it is normal. The back, it looks as though it was pulled in from the inside. If that makes sense. Didn't think much of it, chalked it up to a weird defect. Now Spike, one of the babies, is developing in the exact same way. Him and the others were deficient in vitamin E, so I'm wondering if the weird comb growing is a deficiency symptom too, or an unrelated thing. Since it looks identical to the hen, but different breed, age, and bloodlines... then it must be a "thing" and it must have a name. Any ideas?