I like the composition. You left room for the virtual legs, have more room in front then behind and about the same room top and bottom. Eye contact is good as well.
The image does have a yellow cast that once removed will improve the colors. Thanks for posting.
John I played with the color balance and came up with this Just added some points of blue to counter the yellow !!! Might give also a bit more room for the animal !!!!
Like this comp. you have good eye contact and some action with the tongue out. The first version has a bit of a yellow cast, Al's repost looks pretty good to me on my monitor. I'm sure it's just a matter of monitor variation. I think a litllte more room all around would help as well...