What breed and weight is he?How long is he doing this?
What does he eat?Does he take any medication or have any known health issues?Thanks,,
I am sorry your baby is having trouble
The most common cause of this type of cough is irritation to the tracheal. While it could be a parasite infection or other infections the fact that it is ongoing, only occurs after drinking and the sound of the cough leads to one very clear diagnoses which is tracheal collapse.
Tracheal collapse is a condition in which the trachea partially collapses as a dog breathes, leading to tracheal irritation, coughing and sometimes secondary changes in the lungs or upper airways. It is most common in toy breed dogs but can occur in larger breeds at times. It is reported to be most common in Terriers, poodles, Chihuahuas, pugs and Pomeranian have been reported to be the breeds most commonly affected by this condition but it is reasonably common in all dogs including large breed dogs.
Sometimes a steroid will help with this condition.
Slow down his drinking by adding ice cubes to his bowl of water.
Due to his age he should be seen and checked for dental issues.
Please let me know how he is doing.
Best wishes for him,
I honestly feel your baby can be treated with a steroid and dental scaling.
He may have some swelling in his mouth that is interfering with his drinking and swallowing ability.
I have a dog that is older than him and has lost most of her teeth. But she does fine eating soft food.
I hope he can be helped and you two will have more good years.
Warmest best wishes,