Cough

I have a dog I bought from south texas after i had him for a couple weeks he began to cough like he had been smokin for 20 years after taking him to two vets and ruling out heartworms and kennel cough they came to the same opinion that it was fungus is his lungs. They say it stays in the ground in dry areas and when the dog is hunting and winded he inhails it into the lungs where is grows in the air sacks they said there is a cure, but it can take up to three years to be 100% and since the dog was already seven years old at the time it the cure would be so hard on him it would most likely kill him. Told me just to keep a close eye on him and when he gets winded after a long run to pick him up and let him rest. They also told me dogs can get this fungus if they are kept around chickens and or other birds over time from the dropping. I have had the dog two years now and he hunts just like the rest of them but after a long hard hunt he is through and requires aleast three days rest to recouperate.