Ok Ya'll Paxton was better and then I started adding a few little pieces of food into his chicken and rice.....soft poop again!!! Not to add insult to injury but he is now coughing!!!!! Help! He coughs and then he act like he is chocking!

I don't think it is a reverse sneeze...do you think it might be kennel cough? He came from Glenda's with his shots and Rabies but no bordatella? We have only been to the vets no public parks or anything like that. My other two dogs are fine...all shots and no sickness. What in the world could it be?