Sumatran Tigers painting on wood

I'm currently working on this painting of sumatran tigers. My reference are photographs that I took at the Safari Wildlife park in San Diego.
This painting is on birch wood that has been primed with amber shelac. I am using oil paint applied with pallete knife and brushes along with a finger and rag from time to time.

So here it is. I've already done the underpainitng and now I'm starting to have some fun.