Duramycin wont work after awhile as the disease will build resistance to it. Also, there is a 21 day withdrawal period with duramycin.
I recommend that you treat them with denagard. Type "denagard" in the BYC search box and read up on it. It can be purchased at QC Supply. There is no withdrawal and most importantly...there is no resistance to it. Treatment dosage is 16cc per gallon of water for 3-5 days. Preventative dosage is 8cc for 3-5 days. Give them the preventative dose once a month thereafter. As with all meds that are mixed in water, it's possible that some birds are too sick to drink it or wont drink enough of it to be effective. In which case I recommend that you seperate those birds and treat individually with a syringe without the needle, dose them orally at least 4-5 times a day with a full syringe of the mixture. The other option is to cull them.
Do not add vitamins, electrolytes etc...into the mixture, it can possible cause it to lose effectiveness. You CAN add karo syrup as the denagard/water mixture is bitter.
As far as building up their immune systems, wait til after completion of the "treatment dose." Then you can dispense the treated water and then use poultry nutri drench mixed in freshwater for them to drink. It is loaded with vitamins and minerals, only a few drops per gallon of water is needed. Do not give them the nutri drench in excess of 5 days, it can cause diarrhea.
Here's a link regarding denagard:
http://www.denagard.com/pig-poultry-public/en/index.shtml
I recommend that you treat them with denagard. Type "denagard" in the BYC search box and read up on it. It can be purchased at QC Supply. There is no withdrawal and most importantly...there is no resistance to it. Treatment dosage is 16cc per gallon of water for 3-5 days. Preventative dosage is 8cc for 3-5 days. Give them the preventative dose once a month thereafter. As with all meds that are mixed in water, it's possible that some birds are too sick to drink it or wont drink enough of it to be effective. In which case I recommend that you seperate those birds and treat individually with a syringe without the needle, dose them orally at least 4-5 times a day with a full syringe of the mixture. The other option is to cull them.
Do not add vitamins, electrolytes etc...into the mixture, it can possible cause it to lose effectiveness. You CAN add karo syrup as the denagard/water mixture is bitter.
As far as building up their immune systems, wait til after completion of the "treatment dose." Then you can dispense the treated water and then use poultry nutri drench mixed in freshwater for them to drink. It is loaded with vitamins and minerals, only a few drops per gallon of water is needed. Do not give them the nutri drench in excess of 5 days, it can cause diarrhea.
Here's a link regarding denagard:
http://www.denagard.com/pig-poultry-public/en/index.shtml