I was just checking on the grow out pen before locking up for the night and noticed one of my Barnevelder pullets was standing in the corner with her eyes closed. On closer inspection, her eyes are quite foamy. She's still feisty, standing, tail up, but doesn't seem to be able to see real well. She's otherwise got good colour. She isn't sneezing or coughing and there's no discharge from anything except her eyes. The weather was a maximum of 27C (80F), so it wasn't too hot. They have fresh water and food, always. Their food is a good mix of pellets and grain with 17% protein and no calcium. She's about 10 weeks old. I've separated her from the flock and given her Avi-Vital and Minerals in her water. As I didn't notice until the sun was setting, she's unlikely to touch tonight unless I force her. Any advice on what it could be would be appreciated. After reading some comments in the worst mistakes thread, I figured I'd ask straight away this time and see if any of you recognised the symptoms / could give advice. Edit: possibly Coryza. Reached out to vet tonight. Hopefully get in to see tomorrow and figure it out. No others showing symptoms, but if Coryza, it's unlikely it hasn't spread. Ugh.