I've got an 8 month old mystic maran with a respiratory infection/mg. She has been wheezing, but eating, pooping, laying eggs etc. Her weight has not changed the past 2 weeks luckily. I started with vet rx and purchased tylan 200. I gave her .5ml into her breast today and will repeat in 48hours. How long does it take for her to start getting better ? How long after symptoms subside can I reintroduce her to the flock ?