questions: reported duck are dieing with head bending symptoms 
 answers: recommended to give tetracyclin wsp vet or tetracyclin powder @ 1 to 1.5 gram / litre drinking water water, immuplus @ 2 gram/5 litre drinking water, vamliv forte 10ml/5 litre drinking water, antitox 10-15ml/5 litre water. mix all these medicine in 5-7 litre drinking water at a time for 3 to 5 days. consult with nearby veterinary officer for post mortem and further diagnosis.