Our little foster son is home from the hospital again and is much calmer. He is able to keep food down most of the time ... we have added rice cereal, which is too early for normal children but in his case it was recommended ... to the formula, which we changed from the soy-based at his doctor's recommendation as well.
He had an electrolyte imbalance and began to show evidence of infant jaundice, which had not presented earlier. He wasn't seriously dehydrated, which surprised me, but he had to go on an IV for a few days to correct the electrolyte thing, and spend some time under the bili lights for the jaundice.
He is sleeping more than an hour at a time now and I am able to bring him to work. He is also spending a few hours a day in quiet observation, which is a healthy sign. I wear him on the Snuggli now for bonding, since I can't nurse him, and he is calm enough to be in the pack without arching his back and screaming.
Thanks to all those who have been concerned.