I think @Shay1Bear should give the amount @KsKingBee used, which was 0.25ml Tylan 200 to a 1000 gram bird?
-Kathy
Yes, that is what I did and the worse bird is still showing some yawning without the sneezing after five days of injections. The other one has returned to the flock but this one will get two more days then I will re-evaluate.