Like the title sais, the command is not working properly. Tried multiple times at different locations and with different mobs but the spawners remained as pig ones. Short thread, but there's nothing else to be said about it. (Perhaps this should've gone into the bug section of the forum?) Regards, Sunundrade
Right click the spawner and the spawner GUI should open and you cans select between all the MC animals and mobs
Yup as julio said it's done with a menu now when you right click the spawner.. also be aware that you have to relog for the spinning mob in the spawner to visually update.