The only living thing that makes poo that's more nutritious than what they eat are the earth worms!
Every plant I've even given this to shoots up in the air, and grows faster than anything you can buy for money!
In this little box I house thousands of my dear pets ;)

I only feed them organic vegetable scraps, and for carbon I collect rotten tree trunks in the forest :)
They eat 2x their own weight each day!

As you can see, there's not much food left, even though I feed them a week ago!
They are dendrobaena and tiger worms that I bought from http://yorkshire-worms.co.uk/

They are much better composters then the native earthworms. You should however be able to find them in horse dung, and other rich sources of nutrition for them.
When the bin has perfect conditions, there's no faster way to create compost !
The wormcastings you get doing this is like anabolic steroids for your plants. I had a small chili plant once, gave it wormcastings, and in two weeks, it grew to 3-4x the size it was! Inside in a windowsill. It got too big...!
Stay tuned for more @wooly!