Like the photo, but I'm not digging the border. It takes away from the photo. If you're going to do an all-around border, try something more subtle like a 1px border. If you'd prefer a thicker border with more artistic statement, try a thick border but only on two sides.
Thick borders on two sides always looks cool. Sometimes you can use a weird photoshop filter on them and it looks cool too, like changing the layer to overlay or saturation.
Anyway, Pic looks awesome, kitten is adorable and expression of adult cat is very natural. <3