If a lactating mother is available, then I would make every attempt to get the babies to feed from her. Hand feeding is very hard and many baby rabbits do not make it when hand fed. Even if you can get the babies by for another week or two with mom feeding under close supervision, they will be much, much better off than if they get no more of mom's milk.
Put all the babies in a nesting box. Put an inch or two of shavings or soft bedding in the bottom, then put lots of hay on top tightly compacted. Make a fist sized hole in the middle and put the babies with any fur or other nesting materials in the hole.
Then, once the babies are in the nest box, put mom directly over them with her belly centered over the babies. Give her some yummy treats and keep distracted from the babies (pet her and try to keep her calm). Do this three times a day to get her milk flowing nicely and to get her used to the babies nursing. Once she figures out that it helps relieve the pressure in her mammary glands she should start doing it willingly.
How exactly is she attacking the babies? Is she biting them and making them bleed? Is she getting annoyed with them when they come out of the nest box? What exactly is she doing to be aggressive towards the babies?
It may be that the babies need to be keep away from mom except at feeding times when you closely supervise her.
If you are not allowing her to clean the babies while feeding them because you fear she will hurt them, then you need to clean them yourself after nursing. Use a cotton ball and warm water to gently clean their privates and try to get them to pee or poop.
If you absolutely cannot get mom to sit still and nurse the babies while sitting on top, you can try to flip her over and hold one baby at a time to her nipples. You should do this with two people though, one to hold mom and one to hold the baby, because one strong wiggle or kick from mom can send a baby flying. Do not worry if the babies go franticly from one nipple to another, that is normal and they are getting milk, they just like to switch around to different nipples.
Also, if the babies have not eaten in a day or more, then you should worry about hydrating them first. Use some unflavoured pedialyte and feed that to them to get them perked up again so they can try nursing from mom. Dehydrated babies will not suckle.
--Dawn
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