
Do you mean he has been diagnosed with Kennel cough or you have been for KC protection ?
If he has KC it is extremely contagious and you need to stay away from other dogs for quite some while . You should not any shows or ringcraft either until its cleared up completely because of this :(
Even when his physical symptoms have gone it is still contagious
Ring the vets tomorrow and ask to speak to him so that you know exactly what was said