On Sun, 23 May 2010 07:40:37 -0700 (PDT), Val Gal
wrote:

Five times in the past two weeks, "something" has left parts of small
animals at my front door. The items range from liver, kidneys,
intestines, and once a small paw like a squirrel's, but very little/no
blood. I dispose of the items and hose the area down (I removed the
front door mat after the first time). I've also tried spraying the
area - one time with citrus air freshener and one time with lysol
spray (got a "present" the next morning). My front door is sheltered
and a little secluded. What might be doing this and how do I
discourage it?

Put up a sign.

No Trespassing.