Gasping hen !

[Fox hound]

My hen has been gasping for breath and was sneezing, we gave her Tiaguard12.5% liquid in her water with karolcorn syrup and acted like she had gotten better. But now she is gasping even more now.

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[coach723]

If she got better on Tiaguard, and is now getting worse again, then it may be mycoplasma galisepticum, that is a common respiratory disease. The medication will not cure it, it's chronic and symptoms will return during times of stress. The medication will help control symptoms. Some people treat monthly to control it.
https://www.merckvetmanual.com/poultry/mycoplasmosis/mycoplasma-gallisepticum-infection-in-poultry