Hello, this is my first time posting on this site. I'm somewhat new to chickens and need some guidance. I've had 3 English orpingtons randomly died this week. It was unusually wet and rainy this week I'm wondering if they had gotten sick. They have shelter but don't use it during rain. I'm wondering if it's something else if I should do some preventative antibiotic treatments for the whole flock. If I need to look somewhere else on this site for some answers let me know. Thanks in advance. I'm posting some pictures and I don't see any crust around the eyes. Somebody more trained May pick up something I haven't. I've had these birds for over a year with no health issues.