First off, get the buck out of the cage as he could kill and eat the kits. The doe probably isn't ignoring the kits. Does only feed their kits once or twice a day, usually very early in the morning when it's dark and safe. They try to stay away from them so that other rabbits and predators will not have their attention drawn to the nest. They are in a nest, are they not? They should be in a nest box filled with hay or straw and lined with her fur she pulled. Does one of the look like she is missing some fur? Does one of them have nipples you can feel more pronounced? That is probably the mother. If you find those nipples, you could try testing it out with one of the larger kits and see if it will try to suckle. If you can identify her, they get rid of the other doe, too, as sometimes they will hurt strange kits. Then be prepared that they other doe could have kits too as he could have bred with them at any time. This is one of the reasons that rabbits should never be kept together at any time after 10 weeks of age, even same sex, as they sometimes will fight, other times, just breed and breed, even being pregnant with two litters at the same time, which is very possible with rabbits, but so very hard on the doe and young kits physically. Please separate all these rabbits and get them spayed or neutered as soon as possible. They will be better pets and will live much monger, healthier lives that way.