Maybe the Grossest Thing I've Ever Seen ...

From a reader, Gena in Georgia:
AD: Here's a photo to go along with the 'decomposing rat in the front yard' story!
The attached photo is what is growing--not decomposing--growing on my lawnmower. Yes, growing. Last week, Spot the Cat, threw up giblets (he hates Friskies) onto my lawnmower. It looked gross by Friday, so I didn't remove it. Sorta hoped it would disappear.
By Sunday, the mass of giblets starting taking on an odd shape, and it was getting furry. Soft downy fur. Photo taken...