Hello, my name is***** and I have over 20 years of experience as a veterinarian. I'm sorry to hear that your fellow is making a coughing noise and then proceeds to gag and vomit some foam and food. I do need to ask some questions.
How long after eating does this occur?
Has he always done this, but now it is more frequent, or is it new?
Is he retching quite a bit before this starts or does he seem to cough, gag and then vomit with little effort?
Does he tend to gobble his food?
Is he losing weight or is his appetite any different?
Any changes in food or treats?
Drinking more than usual?
Is he lethargic?
Any other dogs in the home and if so how are they?
Does he go to the groomer or do you have a mobile groomer?
Thanks for your patience with my questions, they will help me guide you better.