Hello, So I beleive I have one bird with a respitory infection and I have a dozen birds total including three 6 week olds. I have two other birds that I had once beleive to be motling but have had problems with neck feathers not coming back...not sure if something else is going on so I have decided to treat all with duramycin antibiotics. First will the 6 weeks old be ok? Second I beleive it is 1T per gallon and I do it for 7 days, is that correct? Then toss the eggs for 2 weeks. Just want to check on any other advice.