I had been working in my studio on a watercolor of cyclamen and had left it for a short time to get some coffee. When I came back the two of them were in there, one still on my work table. I shooed them away and to my horror discovered two pink pawprints on my painting. They must have gotten their feet wet, then stepped onto my pallet and then the painting. I think I can save it, after some scrubbing, and I'll paint a few extra leaves to cover up the damage. GRRRRRRRRR.