how to find out if my cow has influnzea B

Cow flu is not a common diagnosis in cattle, and influenza B is not something we usually confirm in a cow. If your cow has fever, cough, nasal discharge, dullness, or reduced feed intake, first keep her separate from the herd, give clean water, soft fodder, and watch her breathing closely. Check whether there is mouth ulcer, frothy saliva, or lameness too, because FMD or a chest infection is often more likely than influenza. If she is breathing fast, not eating, or the fever stays for more than one day, she needs a vet examination and testing. Consult a veterinarian before administering any medicine or treatment. If you want, I can help you narrow it down from the exact signs and tell you what is most likely. Treating early protects milk yield and prevents the whole shed from getting affected.