Those pesky cats

Brrr, what a cold snap. Relieved those bulbs are planted and the perlargoniums are now safely inside the greenhouse. Still, I got out there today and cleared up dead leaves and cat turds. Why don't cat turds decompose? What is it they put in Kit-e-Kat these days? I snipped more holly sprigs from some bushes on nearby common land that doesn't appear to belong to anybody (sorry if it's you) and put them down in the vain hope that I will find fewer fresh turds next week-end. My more pleasant discovery was a single pink rose, clinging on despite the frost.