Posted: 13/09/2014 at 18:27
You don't really need to add dirt (earth?) to a compost bin, just a 50/50 mix of greens and browns, i.e. fresh green stuff and dry stuff like paper and cardboard/ straw/hay/ animal bedding, but NOT the poo from animals like cats and dogs in a home composter.
Today, was doing a Master Composter event at the Green Centre at Swaffham in Norfolk and met some volunteers from the Thetford Arboretum who have discovered a way to compost dog poo in Bio-degradable bags in a specially adapted bin. Will do some research on this and report back