A. Respiratory issues such as asthma, viruses or bacteria such as kennel cough (bordetella) and upper respiratory illnesses, or lung issues may all cause symptoms such as coughing, sneezing, congestion or excessive swallowing. If the problem lasts for more than a day, or you see other symptoms of illness such as lethargy, fever, or loss of appetite, then it is best to schedule a veterinary appointment to look for the cause of the problem. If your dog develops any difficulty breathing, pants heavily and is in distress or has blue/pale tongue or gums, it may indicate a serious emergency which should be brought your your ER clinic immediately.
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