you can put any size shelves in there that you would like. but yes, pls take out all the plastic shelves. and to be honest, i'm not sure if i heard it was this cage or another cage, but i heard on one of the ferret cages, there is no more plastic in them, but metal instead, so maybe you'll be okay.. sorry, i just don't know that. oh also, pls do not use the ladders they put in there, unless you cover them.. a chin can get their legs caught in there and end up with ampution if not covered.
as for the cages, i have to check out the shipping price and when i do i will send you an email for the cost, these are actually shipped directly from the company via ups.
thanks so much for giving me a chance, i really hope you are 100% satisfied
jean