Excretion
Giant pandas get much of the water they need to drink from bamboos in the wild. Panda's only digest 20% of what they eat the other 80% is excreted. Pandas excrete up to 40 kilograms per day. Because their feces eliminate more water than their food brings in, they usually drink at least once per day.Their excredted waste is also used to mark territories and helps the females to find the appropriate male mate.