OMG My father in law has just injected my chickens with 0.3mm Tylon 200 and one of my chickens died in 5 minutes! chickens are showing signs of respatary inf and have all been to vet who gave me the tylon and dosage, has she just had an reaction or was she too young? she is a silkie/Sussex 12 weeks old, he gave it in the left side breast... We have to do the right side in 2 days but im too worried! what do you think???