Help dealing with mobs and such

Well im working on making a server with like designated mob spots. For instance on a farm it would have a chicken box with fences around it and a chicken spawner inside it. As my server lags with most mobs on and i dont like the world being filled with wild farm animals. So i turned off Mob and Enemy spawning in the server.cfg and decided to get some plugins to make this work. So i picked up the Monsterbox Plugin hoping it could do the job, so i set the spawner down next and on dirt and grass hoping that pigs would spawn, but they didnt. So to get to the point i need some help figuring out how to either bypass the mobs not spawning with monster spawners. Or making it so that mobs wont spawn on grass and in dark but will from spawners.

Thanks,
x3ndless

 

While there may be a plugin that can help you, I don't know of it.

The problem you are experiencing, however, is due to having turned off mobs in the config. Even if there is a plugin that allows you to selectively turn on specific mobs in a given area, you would need to have mob spawning / enemy spawning turned on in order for it to work.