Minimum content 25Ltrs. Keeping the ground of your chicken pen clean and dry plays an important part in maintaining the biosecurity and comfort of your birds. No birds are happy in wet muddy conditions. A simple answer is to provide a thick layer of woodchips across the run. This gives the birds a surface to scratch around in and keeps the floor dry, so making it easier for your access also. This woodchip is also suitable for garden paths and makes great lighting fuel for bee-smokers.