Although Tylan ans Denagard are good to use to treat mycoplasma, oxytetracycline and chlortetracycline can also be used, and may be less expensive. Sorry that I forgot to include the link to diseases: http://edis.ifas.ufl.edu/ps044 and http://www.thepoultrysite.com/disea...ction-mg-chronic-respiratory-disease-chickens
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