This is a caterpillar going through a molt. The cat grows but the skin does NOT. So therefore it leaves everything behind...face and all! *smile* In just two weeks the caterpillar will shed its skin five times. In other words, the insect must wear and outgrow five skins. Each skin is called an instar.
Okay...look at this problem child (one your right)! What you say? Well the 🐛 has formed his silk button onto not one but 2 leaves. Not cool. Even if I wanted to carefully cut the leaf to move #1 elsewhere I'd be cutting #2s antennas. Really!? Time will tell what I'll need to do. Is mother nature as crazy about her cats as I am? Lol I doubt it. 💜🐛
What I did was gently cut the leaves and pined the caterpillar and the leaves it was attached to one another site, on top of the cage. Once it turned into a chrysalis, I removed the silk button from the leaves and attached with a straight pin as you see below. The pin is on top, above the cages, as to not stick any of the cats.