Dog Sinus Natural Remedy. Mix with lemon and honey to taste. This herbal formula contains a number of herbs (such as elderberry, licorice, lemon balm, lomatium, and usnea lichen) good for boosting the immune system and supporting sinus health.

It can be mixed with food or given by syringe. Home remedies to clear your dog’s sinuses include using a humidifier, flushing the sinuses with saline, using a nasal aspirator, or giving benadryl. Tumors of the nose and sinuses account for about.