I am looking at this several times now and I still cannot put my finger on it. There are parts of the scene I really like, the backlit cows in the (late afternoon?) light, the reflections of the animals, the overall colour scape, the trees...
.. then there is the shadow in the empty part front left. I feel you should really cut that out and the house....
...all this an emotional reaction, not a thorough analysis. This works for me: