 And that's really what the data is showing. Professor Maggie O'Hare at the University of Arizona and other scientists compared 81 veterans who had service dogs to 75 vets waiting to get service dogs. The dogs are trained to interrupt panic attacks by giving their vets a nudge. The research showed those with service dogs saw a bigger improvement than the vets on the waiting list. Iraq War Vet Dave Crenshaw said his dog Doc is the best kind of medication.