Many people have the common dilemma of what surface to put on the ground of their dog run. Grass would just be destroyed and dug up, stones or bark will just be messy.
Artificial grass is an ideal solution. Have a look at this lovely clean enclosed dog run. Urine does not stain the grass and dogs are unable to dig through the fibres of the grass.
If required you can periodically clean and powerhose the grass if you find that your dog has done some messy business and it needs good clean. Regular household cleaners such asDettol, Jeyes Fluid or even Milton or bleach will not harm or damage the grass in any way.
Clean and simple.