Trevor had headed into the horse pen and without thinking grabbed the feed bag, slipping it on. At first it was loose, but he was still able to take a mouthful of hay. With each bite it grew snugger, and unnoticed by him his face stretched out enabling him to reach further and further down the bag so he could continue eating. He reached the bottom and whinnied with disappointment that it was all gone. Sighing he reached up to unhook the bag, annoyed at how clumsy his hands were now - he could have sworn he now only hand two fingers and a thumb on each hand and each was tipped with something hard like a hoof.
Neighing he looked up at the others and took a step back in shock. Having spent a lot of time on various websites, he was familiar with transformation stories and art so instantly realised the other were transformed, and guessed what that sensation in his ass meant. With a groan he looked down confirming that he was now a mare.
