No, I'd not heard of it either. I searched COL to see if there were previous threads but no. Looking it up on the Internet it appears cockers and goldies are the breeds specifically prone to it so thought I'd post. Apparently it's not a big cause for worry. It appears suddenly, is a sort of temporary facial paralysis. Alfie's right eye is half shut, his 3rd eyelid has risen up, and his eyeball is rolled up a bit so he basically looks cock-eyed. Not a good look. Instead of scratching his head a lot, my vet actually recognised it immediately. His right jowl is also drooping down. The brain is not affected so it's not a stroke, and it's not an eye injury but a bit of damage to facial nerves. It can be idiopathic or a result of a bit of a bash to the neck or (after reading the Internet you obviously get more sinister interpretations like, rarely, a tumour or something). Vet says it'll go away in a week or 6 weeks (or when it goes) and meanwhile we have anti-inflammatories to see if they help.
Meanwhile, Alfie, who can look very shifty, is looking even shiftier at the moment with his boss eye. My poor boy.
Has anyone else had experience of this?