I think with baby birds it's similar to other found animals in the wild. I only know from a few types of found critters (fox kits, chipmunks etc) that if there is chance they haven't had fluids for awhile, they may be dehydraded and forced fluids could hinder, not help. Any wildlife rehabilitation site would be best, if at all possible at this point. Thank you for trying. Baby birds are more fragile however, and her advise (RG_) having the experiance is no doubt right.