Okay well I have looked up about guinea pigs and I e berg lettuce well now it is to late I had ran outta food ?

And gave them a bowl of iceberg lettuce but now that it is most of the way gone I can't take it back and now I'm worried because I really shoulda used common sence and looked ahead of time .... :( what should I do they keep mAking there lil noises at me are they mad what's gonna happen ?????