Flea collar cause a dog to cough?

A dog may cough due to a flea collar if it experiences an allergic reaction to the collar's materials or chemicals. Additionally, if the collar is too tight, it could irritate the throat or cause discomfort, leading to coughing. It's essential to monitor your dog for any adverse reactions and consult a veterinarian if coughing persists or is accompanied by other symptoms. Always ensure proper fitting and choose a collar that is suitable for your dog's size and sensitivity.