My dog won’t eat and keeps making dry-heaving sounds

A puppy not eating and dry-heaving, with cough, runny nose, and dry cough, suggests a respiratory infection. If vaccines are incomplete, consider infectious causes like kennel cough, distemper, or parainfluenza.

Frequent dry heaving with nothing produced may be a throat foreign object; get an X-ray at the vet to remove it. If vomiting increases with diarrhea, consider parvovirus; best to screen at a vet and treat based on results.