I just got off the phone with Northwest and again they told me NO they do not require any health certificate.
But this girl could not really answer any of my questions - she read me something though that said 2 dogs in the same family could fly in the same bag if they were small enough -- well their in my family - so that's the same family to me!! But I think she may have meant a momma & baby puppy.
She couldn't answer what happens when I get to the ticket counter & before I board the plane - the things I really want to know, how closely they check the dogs.
So....I called the airport - but of course they can't put me in contact with someone at the counter at Northwest. It is so infuriating when you can't have a conversation with someone on the phone!! So, at some point I'll drive out to the airport - pay to park

& go in and talk to someone I might potentially deal with.
Or has anyone flown Northwest & could tell me what happens at their ticket counter & at their gate??