The girl in the floral skirt who came out of the maple forest, 'Hettie', pushed open the wooden fence blocking the path and led Bartlett into the farm.
To avoid scaring the various livestock in the farm, Bartlett sent his Nightmare Warhorse back to the Shadow Plane. 'Carrot' could hunt there too, preying on the unique native inhabitants of that plane.
The Shadow Plane is a twisted reflection of the Prime Material World. Bartlett had heard Edmund, the mage who transformed 'Carrot', say that many things seen in the Prime Material Plane, like animals, plants, and even monsters, have their counterparts in the Shadow Plane, but they are shadow versions.
Last time the barbarian called out 'Carrot', he saw the Nightmare Warhorse holding a small shadow creature in its mouth. The creature resembled a two-headed rat, and its body seemed distorted and faded in the sunlight.