I have been in this dreadful pickle before too. You should try bowl feeding them as soon as possible - it is very messy as they all want to drink out of the same spot in the same bowl at the same time, but saves hours of time on individual bottle feeding. To get them used to it, push their snouts into the milk over and over again - from the moment they take the first lick themselves they will get the message and lap it up as fast as you can pour it out. Even if you can only get one self-feeding to start with, the others will soon copy. If this works, and as they are still very young, start off with feeds every 4 or 5 hours, then start increasing the amount and the time between feeds, but hopefully they will be back with Pru by then. Best of luck, I know exactly what you are going through!