It's always hard to be your own critic especially when the subjects are near and dear to your heart. You say that the image came out alright but asking the question suggests you are looking for ways to improve. If you sit back and look at the photo what do you think you would like to change? Does the fence bother you, do you see enough of the people behind the horses, too much of the horses, or the low shooting height?

Looking at the image I think your thoughts were to include the complete bodies of the horses and get down low to change where the fence goes through the image. There is nothing wrong with that result. The different surface in the foreground is reasonably well blurred but could easily be cropped out if you feel it is not contributing to the story behind the image.

If you want to make it more about the people then having the horses backup just a little bit could help with showing more of them or moving in closer to change the cameras view of the spatial relations between people and horses might show more of the people. A tighter crop to make the faces bigger could also help with that. If you want to get some idea of what that would look like just try cropping in on one of the images you have. It won't change the perspective but will at least allow seeing more of the face and expressions for a point of comparison. Tightening in will also allow moving the camera higher again.

At the end of the day it comes down to choosing to emphasize different things and how you go about it.No two photographers are likely to come away with identical images as there are so many options to choose from. The answers that each arrive at is a function of their own styles and ways of seeing. To better develop your own look at lots of images from different sources. What appeals to you, and the harder question of figuring out why, can be helpful when you are out in the field. Taking multiple images from different positions with different focal lengths and apertures will provide you with images of your own to ask the same two questions of as well as helping you come to a better understanding of your equipment and what an image will look like if you try this or that.

Apologies if I seem to have gone off a bit into the deep end.