My 6 year old cochin hen presented originally with maggot trouble and a foul odor. Cleaned the maggots and treated open wounds near vent that I found with Blu-Kote. Was not ever sure how the wounds occured. Her mood improved, wounds healed and appetite returned. She was able to move back into the coop and for about 5 days, she ate and drank and took dust baths with her usual vigor, despite this lingering foul odor. I couldn't figure out what was making her smell so bad--couldn't find any other broken skin and feathers were clean. Maggots became a problem again this weekend and during washing I discovered that she has chunks of old egg yolk coming out through her skin on her belly near her vent. I was able to remove 3 signifigantly large pieces of hard, yellow yolk. She went out today, ranged the front yard a bit and ate and drank, but looks depressed and is totally subdued. I checked her vent and it's totally intact and empty. She has not laid consistently for at least 3 years. She's laid 1 egg this year so far. I can't find any info on internet about egg coming out through skin. Anyone know anything? She's so important to us---we love her so much..