I've decided that if and when any of mine become ill, I'll do my best to treat them at home with the help of friends on here and a bit of experience, as you are doing so successfully. Chickens often seem to respond to simple home remedies and general good management, without recourse to the vet and definitely no antibiotics. Vets seem to prescribe Tylan or Baytril whenever they're not sure what's wrong with the bird, maybe because the client expects them to do something, and despite the drawbacks of antibiotic drugs, and if they do get better it's put down to the antibiotic whether or not that had anything to do with it. Also, although I'm fond of my chickens I'm resistant to paying vets bills, which are very high in proportion to the cost and life expectancy of a chicken, although I understand that other people will do almost anything for their birds. With a bit of hard-won experience, you get to the stage where you can recognise conditions which are most probably terminal and painful, such as prolapse, peritonitis or various contagious or infectious diseases such as bronchitis or Mareks, and in these cases I'd have no hesitation in culling the bird. Fortunately, with good management and healthy stock to start with, such occurrences are rare, and my main problem is the tendency for hens to clutter up the run by living very long and healthy lives long after their egglaying days are over!