Ok so I found an abandoned mine shaft in my survival world and I went to explore it and I found a few mob spawners in this mine shaft, I was expecting to see spiders spinning in the spanners but they were PIGS. I was extremely confused, but what really confused me was that every chest next to the spawners were empty, which I was mad about. later that day I found a another mob spawner in a cave system I was exploring in, and the same thing appeared, a spinning pig and an empty chest. Can someone explain to me what is going on?
Pig Spawner?