Shape Keys: Best method for simple mouth shape Im trying to determine the best way to create the mouth animation of this hard working carrot! I will use shape keys, I’m just trying to create a clean mouth shape out of the Mesh. I’ve tried extruding faces (but shape isn’t great) as well as live sculpt but can’t really get a successful result (selected part of mesh not deforming well)

Here’s the GIF: https://giphy.com/gifs/carrot-14m3HcGbcy4v9m

I’ve also tried a Boolean operation but it creates sharp edges. What’s the best method to accomplish a mouth like this? Do I just need to get better at sculpting? :) THANK YOU!
Yes extrude inwards seems like the right thing to do, here is a quick try, make sure you have enough geometry. Also have you tried bones instead of shapekeys?