I've seen other posts about what part to feed but I tried it twice and it is a no go at my house

One night I chopped it all up into little pieces = nothing
Another night I hung it up in the cage whole = nothing

Sometimes my girls will not eat something cut up but they will eat it hung up in the cage, they are weirdos.

How do you guys serve Bok Choy? Is there a way I can cook it maybe?

I just tear it into little pieces, like lettuce, and feed it raw.

Zoe pretty much only eats the leafy part, kind of picks at the other. We've chopped in pieces and have left a large leaf as well, she had a ball ripping it in shreds when we left whole.

Mine go through phases, sometimes it's the leafy part, cut into strips, other times they like the crunchy part at the bottom. If I buy baby bok choy and it has flowers in it, those are a hit! Mine eat it raw.