I read the thread about the lady that saved her flock with gallimycin and vaccinations. I have everything in my cart, ready to check out, but it will be $100, maybe more with shipping. The vaccine info says to "use entire contents when first opened" and that they must be re-vaccinated in 3 weeks. Do I have to buy a secind bottle? I only have about 15 birds total. Can I just cull the 2 symptomatic birds (one with stinky mucus and one has a faint wheeze)? If no one else has shown symptoms, does that mean that they haven't "caught it", even though they have been around the stinky bird?