Thanks Nancy
They have no problem eating... even when we are feeding them it takes about 30 minutes but they eat more than the minimum... they have great appetite, and no vomiting/spitting at all.
I think they're just waiting until they put on more weight (they're already back to what they were at birth almost and it's only been 3 days) and until they can maintain their body temperature... Lisa has to be in the incubator most of the time still, even if she gets out for feedings etc, and Chris still has to be under the heating light occasionally.