Steven Spielberg's movie War Horse was a tremendous box office success. It also had the critics singing his praises once again. You can't really argue with the financial returns. However, I think he could have improved the story line with a little bit of tinkering with the script.
The idea of a horse caught in the horrors of trench warfare will no doubt tug on a few heart strings, but it isn't really the best choice of animal for the environment. A horse is somewhat limited in it's fighting capacity. So why not swap the horse for a rhino?
Unleashing a rhino across no-mans-land would surely cause havoc in the German trenches. Especially once it catches a glimpse of the spikes on the German helmets popping up above the trenches. It's just a matter of plying the rhino with the right aphrodisiac and sending it over the top. Although powdered rhino horn might not be the wisest choice under the circumstances.
Once the rhino drops down into the German's trenches the ensuing chaos would surely make for a thoroughly enthralling movie masterpiece.