Daily Cat Drawing #17

For a while now, I've been trying to draw an old cat for a character in my story. This is something... quite difficult to do. It's really hard to depict age on an animal for me because it's something I've never done. Sure you can add wrinkles, tattered fur, more wrinkles, but how much are you gonna add before it starts looking freaky?

This sketch I did delivered a sort of feel for a strong, old cat. Which is exactly what I was trying to create!
I think it's the chin and the size of the mouth...