I know for a fact you have heard about the size a million times already and we already talked about that, will try to find some on line tutorials that will help with that. Otherwise this is a great shot! I love the expression on the cat's face, the lines going both ways, one doesn't overpower the other and yes, the foot getting cut off is a bit distracting but also lends to taking you in or out of the picture as a line of reference. Also, I can see the horse on the rug in the background, LOL :) I give you a 5 to start but am bumping to a 6 because the shot is good, just a bit small :O
This is my second go-around =) - I really wish the photo was larger... if are unsure how to do this for the contests you can PM me afterwards. I really love your idea! I would like to see some highlights on kitty. Otherwise, great composition and idea!
I'll join in with all the others: too small, you need to make use of the allowed 640 pixels on the long side. The background is a bit too busy for a portrait, too.