As a natural expectorant, irritation and inflammation reducer, it makes sense that mullein leaves can be used to help treat coughs, bronchitis, asthma and other respiratory problems in pets. (dogsnaturallymagazine.com)
There is no cure for the flu, but dogs can be tested for other respiratory problems with similar symptoms (chicagotribune.com)
Birds can react badly to secondhand smoke and may develop eye problems, as well as other respiratory problems like coughing and wheezing. (petsmagazine.com.sg)