certainly sounds like the problem to me. Foamy eyes and looking rather spaced out. Lost one today, was struggling to breath last night. Dosed with Citracidal as I had no antibiotics. A little worse this morning, dosed again and got antibiotics from game keeper and added to water. Dosed poorly girl to. Gave her till lunch and she was much worse, so pulled her neck. Poor thing.
Keeping an eye on others and fingers crossed. Had a bad mite problem and think they must be susceptable. More preventative measures needed.