Size of pen for four babies

[Guinea pig slave]

Having just aquired four more baby sows, they are currently quarantined in a 6ft x 2.5ft pen. Is this suitable for them ?
We're hoping that they may get along with our two current girls so their pen can then be opened up into a 12ft x 2.5ft pen. OH is thinking of adding another small level for them all if bonding works.
This is the pen (unfurnished) which is currently segregated down the middle:
http://s1105.photobucket.com/albums...action=view&current=FINALREBUILDPHASE3016.jpg

 

[lauralucy]

hi minimum siz for 4 piggies os 6ft by 2ft so yes it is big enough but being babies they love to run so bigger is better

 

[thislilpiggie]

I need to see more photos please because it looks fabulous and i would like to steal some ideas for mine! My very first piggies arrive on 3rd of july! 2 swiss gp both lovely girls, cant wait! x