Very nice shot. What would make it better is separation between the animals. At least between the front one and the rear two. Shooting from a position a little more to the right could of accomplished this. (though there might be something on the left that you were avoiding).
Since I am lacking in technical skills, I cannot give helpful comments. I am strictly a photo buff who is trying to improve, but as to telling you what is wrong or right, I am in no position to say. I am simply voting based on whether I like the picture or not. Sorry, maybe someday I will be able to give helpful advice