First night in custom snapshot survival world. I was in a village when I heard a baby zombie/chicken jockey. Ran into house to heal, came out and there was a chicken attacking me. It was making baby zombie noises and taking out some health, as well as tracking the villagers. It went out in one hit. It did not seem to be the same bug as the baby zombie being inside the chicken, more like a chicken acting like a baby zombie. I'm not sure what documentation I could provide as this is my first attempt at submitting a bug.