Ranch Friends Set #5366 released 2013-2014. Donkey is a very silvery grey color. Set also included a Bull, Rooster, Calf, 4 Pieces of Fence, Water Trough, and Oat Bag. On the 2014 Retired List, but still shown in the 2014/2015 catalog. These animals are made of a heavier plastic than the typical ABS Stablemate plastic. See separate records for more photos of the animals.
This model is very similar to the Petting Zoo Set #5950. Colors are basically the same, with perhaps subtle shading differences. The most notable difference is the Ranch Friends model has slight pinking on the nose.