Every time a hen lays an egg she pushes out the inner lining of the vent slightly; in 99% of cases this shiny red protruding flesh immediately pulls back inside the hen, in a small number of cases it doesn’t, resulting in a prolapse.
Reasons hens prolapse
- Extremely large eggs which push out more inner lining than is usual .
- Soft shell eggs which can cause the hen to strain hard increasing the likelihood of a prolapse.
- The muscle strands in the lining become stretched, due to a hen ageing.