OMGosh 1/2 lb ??? I would take her to the vet asap ...or you really could lose her if she's having hypo episodes -
I'm no expert but at that size you don't want to fool around ...she's too small to even be away from her mom !
poor little thing - the one thing besides Nutrical is LOTS of fluids - pedialite for human kids is good ...if you have to syringe feed her do that but I would def take her in where she can be monitored if she's this sick - the vet is the best place for her right now at that size ....Is she one of your puppies ...or I hate to ask - did some 'breeder' sell you a dog that tiny ?
GOOD LUCK TO YOU and I hope she's going to get thru this