I have (9) 9 month barred rocks and jersey giants my Husband and I raised from chicks. They have been in perfect condition and laying 7-8 eggs a day. About two months ago we brought home some chickens from a chicken swap that we didn't know we're sick at the time, they ended up infecting our entire big flock. Symptoms were: runny noses, sneezing, really gunky sounding, weight loss, diarrhea, and no eggs. We treated with tylan 50 for 5 days. Since then most of them have recovered with just some random sneezes here and there. The jersey giants are putting back on the weight and the barred rocks are slowly recovering from the last little bits of the infection. We have had nice warm weather here so my chickens free range for most of the day and go back to Their coop at night. They seem to be back in their old routine. The chickens started to improve about a month ago and we still have not gotten a egg In over a month. Is this normal? Are my laying hens still recuperating even if they aren't showing signs of illness?