Here's what I can suggest:
* Consult your veterinarian: The best course of action is to schedule an appointment with your vet. They can examine your dog, assess their overall health, and determine the underlying cause of the smelly gas.
* Possible causes: There are several potential reasons for this, including dietary changes, food sensitivities, parasites, digestive issues, or even something as simple as a change in diet.
* Dietary adjustments: If your vet suspects a food-related issue, they may recommend switching to a high-quality dog food designed for puppies.
* Other tips: You could try adding probiotics to your dog's diet. They can help improve gut health and potentially reduce gas.
Remember: It's crucial to seek professional veterinary advice as only they can accurately diagnose and treat your dog.