My wife does the composting and gardening here - I just do the grunt labor. She says carnivorous poop (the excrement of carnivores?) is dangerous because of the bacteria involved. We haven't had a problem with animals raiding the compost heap, except for one visit by a bear.

Today, my gardener wife got a book called Lasagna Gardening which is mostly a method of doing soil amendments with layers of various materials. There's a treatise on Lasagna Gardening here (click). Here's an excerpt:

Ingredients For A Lasagna Garden

Anything you'd put in a compost pile, you can put into a lasagna garden. The materials you put into the garden will break down, providing nutrient-rich, crumbly soil in which to plant. The following materials are all perfect for lasagna gardens:

• Grass Clippings
• Leaves
• Fruit and Vegetable Scraps
• Coffee Grounds
• Tea leaves and tea bags
• Weeds (if they haven't gone to seed)
• Manure
• Compost
• Seaweed
• Shredded newspaper or junk mail
• Pine needles
• Spent blooms, trimmings from the garden
• Peat moss

Just as with an edible lasagna, there is some importance to the methods you use to build your lasagna garden. You'll want to alternate layers of “browns” such as fall leaves, shredded newspaper, peat, and pine needles with layers of “greens” such as vegetable scraps, garden trimmings, and grass clippings. In general, you want your "brown” layers to be about twice as deep as your “green” layers, but there's no need to get finicky about this. Just layer browns and greens, and a lasagna garden will result. What you want at the end of your layering process is a two-foot tall layered bed. You'll be amazed at how much this will shrink down in a few short weeks.

Looks like fun.
-Joe-