Which hays should be better for my guinea pigs ? - Alfalfa vs Timothy hays

  When we brought Zelda home, we bought starter package for guinea pigs. It comes with a cage, a bag of timothy hays, feeding tray and a bag of so-called 'guinea pig daily diet', which is some manufactured solid food for guinea pigs. We've found that there are 2 kinds of different hays that we can give Zelda. 

bag of Alfalfa Hays

bag of Timothy Hays

  We are told that baby guinea pigs should eat alfalfa hays and adult ones eat timothy hays but when they become adults ..?

screen left : Alfalfa                  screen right : Timothy

  We've found some nutrition fact over the internet.

  Looks like alfalfa hays has more protein. Well, protein is much more needed for growing baby guinea pigs, so this makes sense. Zelda seems like both of them. I think I will give more alfalfa hays for now and when it runs out I will give her timothy hays onward. :)