Well, they've been getting both fresh and dried parsley mixed in with their food for a few days now. Still no noticeable abatment in the plant munching, however.

I'll give Zoe a fresh leaf, and she'll nibble on it, toss it around and drop it to the floor. She'll come back for it hours later (yes, I'll not sweep it up...in the interest of scientific inquiry!), after it's all wilted and droopy, and only then will she actually eat it. Go figure. Since they both go for the dried fern leaves, I think they view them sort of like potato chips. Crunchy snacks. Wondering if I should dry whole parsley leaves for them.