Last night my dog got a hold of a opossum who had babies. Mom got away with 2 but there were 3 left behind. I have used this board before when I rescued my squirrel Gimp. But it has been about 5 years. There is only 1 licensed rehabilitation center in the state of WV and I am waiting on them to call me back. They have been with me since around 12 AM and it's almost 10 AM. My question is how long can they go without food? I haven't given them any formula since I didn't have any Esibilac on hand, they are in a box with a heat pad under it, and I am sure traumatized. They mostly stayed curled up to each other but now they're crawling around and opening their mouths, I know they must be hungry and I'm worried about them possibly dehydrating. How long can I wait while I am waiting on the rehabilitation center to call me back?