Sorry if this grosses anyone out ...

Wolf puppies often lick the faces of adult wolves. The licking encourages the adults to vomit up their dinners ... providing meat the puppies can easily digest.

When you introduce new puppies to adult wolves, it is best to feed the adults just before ... to encourage this natural bonding behavior between adults and pups.

Did your puppies doing this ever cause one of you adult dogs to vomit, by any chance?

Since it is done by submissive puppies to (more) dominant adults, I woul guess that an adult dog doing this is seeking attention from the more dominant dogs in this way because she saw it working for the puppies. It's probably not a hunger thing ... just an attempt at bonding.

Catwoman
(who used to volunteer at a wolf habitat)