The Bird Died !

Not birdie, the blue parakeet.. not that one.. but the yellow parakeet that hubby just bought one or two weeks ago. I don't know what happen. Last Wednesday I checked on it and they are still both so alive. I didn't check 'em yesterday coz I was out almost all day. Then today, I saw the yellow bird lifeless.. It looks like they had a fight and since the blue bird is bigger I guess she beat up the yellow one. :(