I have a 14 yr, 10 month old Dachshund that has been having about 23 different allergies since he was about 3 yrs old. His present condition is that he has been heavily congested, having sneezing attacks, slightly thin to think clear mucous coming out of his nose, and congestion in his lungs. We have all of the ceiling fans off, and I have an air purifier on at all times. I took him to the Vet about 3 times for this, and they gave him shots(Cortizone, Antibiotics), and antibiotics by mouth for the last month on and off. Also, I purchased some herbs but that did not help. He does not have a tooth abscess. His lungs sounded congestion, but other than him being miserable with the sniffles(sometimes very intense sneezes), and sounding very congested. Please helo?