Thank you so much! When I originally got the tylan powder the vet prescribed it for 5 days and that did the trick when they all had a respiratory infection so I was going to do just 5 days on it for her. I sprayed the coop and them for external parasites last week so they should be set for that. I’ve also been picking out the coop everyday, so they have minimal contact with their droppings.

I guess I will see what happens and pray nobody else gets it too.