looks like dog movement to me as the feet are in focus but the body and head are not - could also be that you shot it wide open at say 2.8 and just missed the focus, but i think it's movement and shutterspeed. You need to shoot that at no less than 50mm, at f5.6 or smaller, and with a shutter speed of about 1/60th.
Depending on your light set up, shutte speed might be a moot issue. However if your shooting with a camera flash, set it for about 5.6 and 1/60th of a sec. Use a higher ISO of you cant get the power you need, like ISO 400.
shoot animals at eye level or there abouts. try not to streach them out. Also if you move them away from the backdrop, you might be able to reduce the shadows. Bounce some light off a white board or reflector, or a white ceiling and that will also help.
Look like the flash is too close, and too hot. I'd back it off a bit. the eyes took a lot of light and the coat's a little hot.
good luck.