The Palomino is yellow because it has been munching uranium.

The Animal Rights Activist discovered this travesty near the building site when she realised how very inexplicably yellow the Palomino was.

She’s now taken it upon herself to save all the horses nearby, fearing that they might be similarly poisoned by the uranium.

“When the Clydesdales, the Thoroughbreds and the Shetlands start yellowing at the edges too, that’s when we’ll know the worst has come,” said the Activist in a voice of doom.