Several week back I lost a duck after she showed the following symptoms: loss of balance, droopy wings, dificulty walking. A couple of week later one of my drakes showed the same symptoms. I brought him inside our shed for several days and he got better so I put him back outside. Several days later he showed the same symptoms again. He's gone back and forth from outside to inside for the past three weeks, primarily inside at night only to stay warmer and get a little extra food. I gave the whole flock a vitamin/electrolyte supplement today, thinking it couldn't hurt. My question now it what else would you recommend giving the duck? I've never wormed them and am not sure what the best wormer would be. An antibiotic? It would be helpful if I knew what was wrong, but unfortunately I don't.