Amphipyra pyramidea caterpillar eating a leaf

Copper Underwing (Amphipyra pyramidea) catterpillar eating a leaf. I want to try and raise this caterpillar, though I've never done that before and I know nothing about them. I was absolutely amazed when I saw how it was digesting the bits of leaf.
And you can hear my budgies in the background. :)

[@craftybeauty2223]

I am raising a caterpillar like this right now. Do you have any idea how long it takes them to change into a butterfly?

[@sarawilliams4210]

What type of leafs do they feed on

[@mossytime349]

leafs

[@patriciaalcano1159]

Ed P