hello i have 13 cockatiels, first i would like to ask you if there is any problem to put them in the same cage, i tried in the past to seperate them but they were too anxious so i putted them all together. i made a cage by myself because i couldn't find what i wanted, from stainless steel and aluminium about 1.50-1.80 mettres each side, could you give me advices what i could do better? enlarge the cage ? and advices about how i could make the room more convient for them, i got the cage in the living room , my living room is with the kitchen, anyway it's safe but i would like some specific suggestions how to make it a parrot room.