Chickens with Scaley Leg Mites. These mites look something like salt crystals and will be attached along the edges of the leg scales. The mites burrow under the scales and the scales raise up due to the accumulation of mite debris. Interesting article with preventative and curative advice. Condition where the hen's oviduct protrudes through the vent and can be a deadly condition.
Article provides remedies for a simple prolapse and infected prolapse.
I don't know, folks, this is mostly links to other sites. Haven't checked them out. Try some of the other articles first and use this link site as a last resort for boredom. While this may not be your intent, the insight provided may be of use to smaller scale endeavors.