Which photo should i use as i am getting a portrait done of my cat?

I love the pictures. In fact I would suggest that you have them all printed and put into one of collage picture mats. As far as a portrait goes, I would suggest #1, the color head shot. The others are adorable but it would get very, very old in a formal portrait. Besides this one shows her beautiful eyes, white whiskers and adorable chin. That's my opinion.