Dog nebulizer mask

One of our rescue dogs has chronic bronchitis. The only thing that has helped so far has been steroids which are, of course, bad for the body. An albuterol nebulizer was recommended as something that might also help and as we already have one for my wife's asthma we have occasionally held it to the dog's nose for whatever benefit it might give.
Actual pet masks are expensive though so I came up with this which seems to work perfectly on our narrow-muzzle, 75lbs, pitbull mix girl. Face portion i