Hi, besides the usual feed, light, molting, deworming, external parasites and stress issues what would cause hens to stop laying? (Since Feb) I originally thought it was stress from the Roo, but one hen my sussex was breathing heavy last week. No other illness symptoms. She has now died. I am worried now something is going through the flock. My Roo is a noisy breather but has since I got him 2 years ago. Oldest flock member is a Silkie, laying at 2.5 years old. And one year old Amerucuna laying. Any suggestions? I live in Alberta. I have given ACV, super booster, rooster booster, garlic and herbs at times. Dewormed this year with Levamisole. No symptoms otherwise. Help! Thank you!