You mean chicken chunks from chicken-bones?
That's the granddaddy of all chunk loaders. Back in minecraft version 1.4.7, it was the only chunk loader.
It has been in every one of my personal modded instances, and never caused me any problems.
Though I rarely use chunk loaders in general, because I play single player, I mostly use the spawn chunks instead. (a vanilla feature)
Keep in mind that this chunk loader is a block you place in the world. You'll need to remember that you placed one. This is not good for the
management of loaded chunks. (and a reason why server owners don't like them)