Fievel was looking forward to Green River's rodeo, training with Tiger for catching prairie-dogs, but his parents expect the kids to be on European best behavior for papa's younger sister from Russia who will be visiting a week, so fancy clothes and no rodeo, nor cat friend Tiger. Fortunately aunt Sophie Mousekiwitz proves far more modern and understanding of the way of the West then her brother Bernard 'Bernie' believed possible: she actually encourages Fievel to return to the cowboy-look and enter the rodeo, even shows him how to handle a lasso like she learned from Buffalo Bill in Saint Louis. Cat R. Waul and Chula hoped to turn the rodeo finale into a mice-harvest, but the Mousekiwitz rodeo team fights back...
—KGF Vissers