Disclaimer: I have absolutely 0 experience getting a WC baby to eat, but I thought I'd throw out the suggestion of tube feeding if you absolutely must get something into them...it may be a little less stressful than force-feeding. Basically, you can mix a pudding like diet called Hill's Science Diet a/d with a little Pedialyte. You need to get the a/d from a vet as well as a red rubber feeding tube and syringe. Fill the tube with your a/d mix and insert it into the esophagus a few inches (not the trachea, obviously!)...Slowly push down on the syringe. I would start with just a few mLs to see how they handle it (ie. make sure they are swallowing it) and go from there!