Don't flame me, but what's with all this negativity
I know it's grim, but at least try and give advise so she can try to save it
How many people have kept and saved the runt of so many dog and cat litters??!!! and how many runts grow up to be beautiful and healthy adults??!! To just give up and let it die is wrong! You have to do all you can, and if it dies anyway, well at least you tried......and didn't just sit buy and watch it die a slow painful death !
Some times they push one out simply because they don't have enough of milk or teats to feed them!
I don't know but I would try and help the baby regardless !