broody hen problem

i have all my dam hens broody they are all fighting for the nest just one nest tho . i have split the egges up so they arnt all in one nest box but they all want to be broody in the one box and there fighting over it . so i took that nest box away . and they just all went for 1 of the other ones . it getting a joke . try and imagine . 30 birds in one nest box thats only 2 foot long .  they all sit on each others heads the lot . just to be in that one they all being togther i understand that they like keeping warm but  there all after sitting on egges . its getting a joke . what should i do ? any ideas many thanks

Are you SURE they are broody AS?  Unusual to get 30 hens all broody at the same time.  What sort of hens are they?

My 6 hens aren't broody but they all insist on laying their eggs (6 eggs a day) all in the same nesting box, which is an old cardboard box with shavings in it. 
In the chicken house (Cluckingham Palace I think it was called!), there are 2 very nice double nesting boxes, 2 wicker baskets that 2 of them used to lay their eggs in, and another single nesting box.  But they all lay their eggs in the same old cardboard box, and even queue up if one is in there laying.  Talk about being fickle!!!  

Valerie