I have this CNPC chicken and I wanted to carry it to a different pen and it died... I'm not sure if there's a way to fix that, but it would be pretty helpful if there is!

I'm in 1.11.2 if that helps.

Unfortunately no, CustomNPC's uses a different setDead method which is used to remove the entity from the world without drops & smoke and such.

Ah okay. Thanks for the explanation!