I have an older doe who has that same look....I believe it is like a goat hemorrhoid or something. It doesn't bother her and it only shows when she is pooping....although I will add, I am not very experienced...but it does not bother my doe at all
I agree..We had a young Mini donkey with a PR and it looked like the pic on the link..this girls bum looks like you discribed...Doesnt look like a hernia either but the pic is a bit blurry...glad the vet is involved...That looks different to me...I have seen prolapse in humans but not goats, though. The pic the OP posted resembles what my goat's anus looks like when she poops...as soon as she is done pooping, everything is back to normal.