It is generally accepted that each budgerigar requires a minimum of 8 inches of perch space each. Overcrowding presents a stressful situation for our birds and fighting is likely to occur. Birds must fight for the right to use perches. If there are not sufficient perches, they end up sleeping on the wire which is not a good situation. Additional stress is caused because of pressure on the feeding dishes and with the extra droppings, this can cause sickness as bacteria multiplies.