I have 4 4week old kittens who mom has gone missing. She wasnt looking too good a few days prior and finally one day she just didnt come back. We are currently using diluted lambs milk to feed them with a syringe as they dont even know how to lap up milk. So anything else we can do to help guarantee that they can remain healthy?
If you can't get support from a local shelter or vet, keep it up with milk from turkey basters/eyedroppers/whatever. Once the eyes have been open for a week or three start prodding them with kitten food, they may upchuck it a few times before it takes with their stomach but they'll be fine before long.
Kittens are pretty simple/resilient, as long as they keep getting milk they'll be fine.
Oh, and shove that dropper in their mouth every hour or two, they will eat *a lot*. They need food more than you need sleep for the next week or so.