Poo.
On last nights run I came across a 2/3 inch long grey stringy coloured piece of excretion. It was slightly bulbous in middle. When I broke it open there were no bones in it just fur or hair you'd expect to find on a vole or mouse. I think owls excrete in pellet form. What do you reckon was responsible for it, kestrel, peregrine, merlin?