Looks photoshopped to me, see back leg!
If you look closely you can see the pads on the paw. It's similar to the opposite front leg.
I agree it does look a bit odd, but I think it's just how the leg/foot was at the moment the shutter clicked.
But despite that and the shadow I wouldn't be at all surprised if it's a faked photo. Hard to believe any photos these days - the camera never lies, but photoshoppers do it all the time