I have no idea. I would take him to the vets.
has he just started having breathing problems?
Heartworms are a common cause of respiratory problems in both dogs and cats, so if you haven't been giving heartworm preventive to your pets regularly we will probably run a heartworm test. it could also be a cold, allergies or lots of things, best to have him checked out by a vet.
Respiratory
I did google it to see what I could find.
heres some thing that I found.
Q:Can Vicks Vapor Rub be used on dogs who have similar symptoms humans get
Answer
Vick's is a mixture of Vaseline and menthol eucalyptus. Eucalyptus is toxic to dogs so no don't do it!