My chickens have almost totally quit laying. I was getting around 12 eggs a day and now I am lucky if I get one. I "assumed" it was either worms or respiratory issues, so I treated them all for both. I gave them Tylan for respiratory and wazine for worms. They started acting somewhat better but today I have one hen who seems to be going backwards again? She is drinking "some" water but I have not seen her eating. She does peck at the ground a little but that is it. Could there possibly be something else going on? Most of my hens are around 5-6 months of age. All the others seem healthy but still have not gone back to laying. I did get 3 eggs today and that is the most I have got in about 4 days.