If its any consolation our 4 ewes in with borrowed ram have now got pink eye too. :-( vet coming tomorrow. They are weepy eyed and a couple are a little crusty under the eyes.
Thank heavens the other ewes are two fields away.
Pretty sure the ram brought it in from what the owner has (now) told me....which at least means I'm hopeful of there being a chance of containing it. The perils of borrowing a ram. On the other hand I don't have to feed and look after a ram all year, so I'm fairly relaxed about it other than the hassle.