Checking in about your horse with cystic corpora nigra – was it just spookiness that helped pinpoint the issue?
My new horse has a large corpora nigra identified in PPE, he is not spooky, but does not want me on that side (left), and is headshy on that side, and he shakes his head frequently while riding even after a fly has left. I just read about a connection between copora nigra cysts and headshaking…
What was the clue for you?