Invasion of the body snatcher

Had a really erie spooky experience today.
Although i am still in the construction stage of my model, i have completed some small areas, one such was a small field under a viaduct, which had the added feature of 4 horses.
This morning all 4 horses have gone!
nothing else has moved, the sheep are still there, the various people are still around the model, but all 4 horses have disappeared!
close examination reveals some mouse droppings,
any rodent experts know if a mouse would selectively take just the 4 horses?
This is wierd.
I should perhaps add that my model is in a converted garage, not the house. and that the field is bounded by track on two sides both of which had rolling stock on them which was not disturbed.
Finally No! I am not having a 'senior moment' and I did not move them myself!