Can anybody enlighten me as to the difference between nuts and rolls?
My collection of GOS is growing, picked up 3 lovely gilt meat weaners yesterday  

Also two breeding gilts coming soon too.  
So looking at a more economical way to buy feed.  I've been in touch with a feed merchant who has given me some great prices per tonne (will deliver in 25kg bags on a pallet, so easy to store).  
I was just wondering what the difference is between nuts and rolls.  Seem to be the same ingredients, I presume it's to do with the size of pellet?  Apologies if this is a very basic question, and something I should know already!
What do your pigs prefer?