is he on heartworm meds? deep throated coughing can be a sign of heartworms & kennelcough. Of course there is a chance it could be that he just swallowed food or something wrong or got into something that upset him. And it could be something else even. it can mean heart problems & all sorts of pther things.

If he is showing no other symptoms & he has not had contact w/ another dog that could of had kennel cough & he is on heartworm meds I would personally just keep a watchful eye on him for a couple days, if it persists or worsens then i would get him into a vet.

how old is he?

good luck, hope chipper feels better soon!