Get Your Dog Care Questions Answered by Experts
You should follow your vet's instructions about his care, not the breeder's. If you want to know about nebulizing the dog and whether or not it would be beneficial, you can certainly give your vet a call and discuss it with him over the phone.
Pneumonia can be pretty serious so be sure to give all the antibiotics until they are gone.
Let me know if you have more questions.