Cute little ponies!
If you'd like your pictures to be sharper, I suggest using a faster shutterspeed. Most of the pics above were shot at 1/8 - 1/20th, which can be very difficult to handhold and get a sharp shot. Notice how the last shot is the sharpest and was shot at the fastest shutterspeed of the series (1/30th). While some people are inherently more stable, I find it difficult to handhold any longer than 1/60th or certainly 1/30th without blur.