My nova scotia duck tolling retriever has been
coughing on and off for years. Sometimes it brings up phlegm; other times not. We know she has allergies to ragweed, grass, weeds, flaxseed. Her food contains nothing that she's allergic to. I understand that her allergies may act up in the summer, but her coughing is year-round (we live where we have winter from Nov.-Mar. so the grasses are dead part of the year).