Hi maclarencat-Yvonne's right, it does sound like allergy. What is your hubby's jacket made of? Do you have any other pets, eg. cats, whose hairs might me setting her off?
What does she eat? How often does she "go"? Does it look healthy (as much as poo can!)? She might have allergy to the flea treatment she's been given.
Try and get her back to the vets, who can perhaps start running some tests. My dog is gluten intolerant, and in the past couple of months he has been scratching and biting himself, so he's just finished a 6-week course of antibiotics and mange diagnosis treatment. Although he is better, he still scratches more than he usually would, so we are back on Monday, when the vet will probably suggest skin swabs, blood tests etc.
Is your dog insured?
Lots of luck, let us know how it works out. X