Thanks for the update. Did you get some Nutrical? That can be found at Petsmart/Petco - it's a VERY good thing to give to dogs in situations exactly like this; it can also stimulate the appetite as it tastes good and brings blood sugar back up (which can decrease nausea). I think it's crucial that you get this.
NutriCal High-Calorie Supplement for Dogs and Cats - Health Care - Dog - PetSmart