Your dog can relieve himself on a variety of surfaces, including pee pads, real grass trays, or artificial grass mats, on your balcony. Because they are strong, simple to clean, and can be used repeatedly, synthetic grass mats are a common choice. For dogs who prefer real grass, real grass trays can be a good alternative, but they might need more frequent replacement and upkeep. Dogs can also use pee pads successfully, but they should be changed frequently to avoid odors and bacterial growth.