I rarely suggest culling. But in this case, I will recomend it. That mouse is clearly missing some important organ (wether it be the stomach, or part of the intestines, or otherwise) and is probably very uncomfortable. 
Although, the stripes look neat, I wish that was the colour of the skin, and not . . . well . . . some sort of problem. Zebra striped mice might be nice.
Although, the stripes look neat, I wish that was the colour of the skin, and not . . . well . . . some sort of problem. Zebra striped mice might be nice.