Meerkat portrait in pastels

I am currently working on a very special 'commission'. I love meerkats and so does my Mum, so this one's for her. :o) I met this little meerkat at Marwell Zoo near Winchester earlier this year and took the reference photo myself (along with about 300 other pix of various animals I might want to draw at a later stage).

Anyhow, this cute meerkat is being drawn in pastels on velour paper and this is how far I've got: