I'm getting Guinea Pigs soon and I'm wondering what a good cage size for them would be. On this site: http://www.guineapigcages.com/ it says I can get three guinea pigs into a 2x5 grid cage (at least.) But the cage I'm looking at is a 2x6 grid. (27x84 in.)

http://cgi.ebay.com/JUMBO-XXL-C-C-CUBE-COROPLAST-GUINEA-PIG-PET-CAGE-NEW_W0QQitemZ300370539093QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item45ef7ab255#ht_2783wt_732

I think they would be a bit cramped though. What do you think? And one more thing! I was thinking that I might get two of these, but how do I connect two together??
Thank you so much!!
--Annabella