The reasons why dogs spit out white mucus when coughing:

1. It may be a respiratory infection, which causes white mucus to get stuck in the phlegm.

2. It may be that the dog has caught a cold, which may lead to nausea, regurgitation, and mucus vomiting due to physical discomfort.

3. It may be that a foreign object is stuck in the throat, and the dog wants to cough it out, or it may cause food poisoning after eating the foreign object.

4. Changing the dog’s food suddenly may cause gastrointestinal discomfort.

5. It may be that you eat too much too quickly or eat spicy food.

6. Dogs suffering from internal parasites or eating improperly will cause coughing and vomiting of white mucus. If a dog gets carsick, it will also cause vomiting and coughing.

Methods to solve the problem of dogs coughing up white mucus:

1. For dogs with gastrointestinal problems, you can consider taking some drugs to protect the gastrointestinal mucosa, such as sucralfate.

2. If the dog only has symptoms such as coughing, it can be fed drugs containing ingredients such as doxycycline and orogenin.

3. The dog coughs and vomits white mucus, and the expectoration fluid is relatively large. Dogs can be given oral medications containing amoxicillin, clavulanate potassium, ambroxol hydrochloride and other drugs, which can inhibit bacteria and promote the elimination of sputum. 4. Provide your dog with timely measures to keep him warm, a light diet and nutritional supplements, and choose light and nutritious foods for him to eat, such as vegetable porridge, pear soup, chicken soup and other foods

5. Give your dog plenty to drink Water, you can eat fruits and vegetables with low sugar content, which can help moisten the lungs and clear phlegm.

6. You can use test strips to test the dog. If it is caused by canine distemper, it must be sent to a pet hospital for treatment in time.