feeder
baby rats often dont make it and baby rats in general have a very hard time serviving without a mother, i was able to do it, but i was also able to spend all day with them and feed them every hour (home schooled and didnt have a job at the time)
its best to not try to save baby rats unless you have the litter an the mum dies, then there is no other way. but if they are feeder rats even if they servive they probably dont have much of a chance of living healthy lives even if they make it past the infant stage. its best not to cause yourself the heart ache and them the extended pain.
im glad the older ones found good homes