Wouldnt be to concerned.
Just do a water change then a few days later, do another one. When my pups were born a few weeks ago, I did a water change everyday for the first three days after they were born.
My pups started eating after about 2 days. but its not unusual for them to go the first 4 or so days without eating.
Dont worry, just kee some blackworms in the bottom of the tank, nothing else. Since the blackworms are live, its better and will keep the water cleaner.
Im sure the pups will be fine also. Give them time, leave the lights off and leave them alone. They will be up and swimming around in no time..
Congrads...