Quoting Allissa Specht:" Our Pediatrician just cane through. We are weighing him before and after he nurses, and after any vomittijg/spitting ... [snip!] ... of nreastmilk. He wouldn't take it so they will no longer try. If he isn't taking in sufficient amounts she will start an IV."
Has his care improved? If it comes down to it, you could demand to be transferred to a bigger hospital... might be farther away from your home, but maybe you could get into a Ronald McDonald house? If you stay where you are, you'll probably have to be very demanding of everyone, they might think you're a bitch, but you gotta do what you gotta do.