People say that urine is good... your choice as to how it gets there :-)

The blurb I got with my new composter says the following :

Natural activators - Grass cuttings (but dont use too much), nettles, pond weed, seaweed, comfrey, horse, cow, sheep & pig manure

Bought activators - blood & bone meal, nitro-chalk & sulphate of ammonia. They recommend a product called 'organica' which is diluted and added

If you can get hold of some manure - we add a layer occasionally and it works wonders! It speeds up the process, and makes great compost as well.

Oh, and by the way - Paul's right - but apparently it should be male urine. Something to do with hormones. I make no further comment!

I give mine a sprinkle of Blood and Bone every so often so it's well distrubuted through the depth of the bin.