I have a nearly 6 month old papillon. He’s up to date on all his shots. He has allergies so he’ll be a little itchy and sneezy at times, but still very playful and active. I recently changed his food from Purina Exclusive Kibble to Evo turkey and chicken canned formula. His activity level hasn’t changed since the switch but I noticed he’s been coughing and sniffling and he’s spit up a little bit of clear liquid and yellowish clear liquid that looks a little foamy. It hasn’t been a full week yet since his food has been switched. I don’t know if this is normal, allergy related, or if I should be concerned.

Thanks for your question.  In general, food allergies, or hypersensitivities, will not show up as nasal congestion and coughing.  The hallmark signs of food reactions are ear infections, skin infections, and sometimes diarrhea.  The coughing and sneezing that you notice may be related to a bacterial or viral respiratory tract infection or one of many other causes.  A good physical examination would be essential to determine the cause of this abnormality.  Make sure you inquire about vaccination against Canine Influenza, a viral respiratory tract infection.  You can call us at any time at 813 973 8566.