Try checking the nutrition threads in the stickies at the top of this subforum:
http://www.guineapigcages.com/forum/...gie-menus.html
For Kale, one sample gives 4 small pieces, cut up per pig, and another gives 2 large leaves per pig, each twice a week.
For parsley 2-3 sprigs per pig 2-3 times per week; cilantro about the same quantities, but daily or almost so.