I have half a dozen "second-hand" black sex link layers that I got about three weeks ago. I noticed that one of them had something yellow (the colour of cooked egg yolk) caked around her vent, but she acted normally, and laid regularly, or has seemed to. I decided that as long as she was happy, I wouldn't worry too much. This yellowish material has persisted. Today when I checked on the hens, I noticed she was "walking drunk", squat-walking with her bum stuck out and her weight much further ahead of her feet than normal, putting off her balance and her "steering". Because she still hasn't grown her belly feathers back from ?molt? ?feather pecking at the previous owner's?, I can see something roughly egg-shaped between her legs, below her vent, under her skin. Is this an egg? Is it stuck? Is the yellow stuff evidence of previous laying problems? (chicken newbie here). (I had thought this lump normal, because before the girls started growing their feathers back, I would look some mornings to see who had this "egg lump" and guess how many eggs would be laid that day. I've usually been right, and the same birds would no longer have the "egg lump".) Information requested as per the sticky thread: 1. Black Sex Link in her second year, smaller than her peers; exact weight unknown 2. walking head forward, bum out, weaving and staggering (probably due to the posture) as if she were constipated (she's not) 3. no external injuries etc. visible 4. unaware of any specific event precipitating this 5. eating and drinking with good appetite: layer mash and water 6. normal poop 7. no treatment, as unsure what the problem is, or if this is just a passing thing 8. would have to be home treatment; no vet near; these birds are not pets but I want to give them appropriate care 9. will stick picture below 10. this flock is on pine chip bedding. Thank you for looking at this, and if you can advise me whether this is even really a problem, my thanks. Sorry the image is blurry, she was modest about having her backside photographed. The pale stuff around her vent is actually yellow in real life. This picture also shows her posture a little as she walks, with her weight thrown forward of her feet.