Nickrass

Hello, i have a problem with spawners. I use a skeleton spawner to suply bone meal for my bread machine, but the skeletons only spawn when im close to the spawner. I tried to use chunk loaders (World Anchor, Dimensional Anchoal and Teleport Tether) to keep the spawner loaded, but that doesnt seem to work. Is there any way to make the spawners work even when im away, or do you guys know any way to automaticaly generate bone meal without the use of EE?