Thanks for the versions. They're interesting.

The references to cattle in the oldest versions had me baffled, but my dictionary tells me that long ago 'cattle' referred to any live animals raised for a purpose - including cows, sheep, goats, and horses. Here the cattle are horses.

According to my unabridged dictionary, skewbald animal has a coat of white mixed with another color. 'Skewes' is a medieval word for clouds. My dictionary is no help when it comes to the -bald part.

A piebald horse has mixed colors, but in the middle ages, it meant black and white. The 'pie' syllable is another name for the magpie, a black and white bird. I believe a magpie also has blue or green feathers, but let's not get silly and posit blue or green horses.