Danaus plexippus - day 2

Baby Danaus plexippus seems to be doing well. For all his eating (chunks of leaf large only compared to his tiny body) he doesn't seem to have gotten any bigger. I imagine I'll have to wait for his first molt to see that. But I am noticing a subtle color change. The places on his body where he was a creamy white, he is now starting to turn the green/yellow shade I'm used to seeing on monarch cats. He is VERY particular about leaves - I have to change them 3-4 times a day. I found him again this morning crawling away from a wilting leaf. I really should consider digging up a small plant and bringing it inside for him...