2 - DMC - No discernible creativity or effort here for the challenge. No action. Too zoomed/pixelated. Should have at least got the dog in action, but still, in my opinion that is not really a 'sport'.
i don't see a purpose for the softness of this image. does a dog with a frisbee sport make? the colors are nice, i like the pop of the blue. overall though, this is marginal.
this photo has a serious lack of focus. No detail to it. The action would have been better demonstrated by the dog jumping up to catch the frisbee - this just looks like he/she is carrying it around.