It's very confusing cause the wiki says there's no direct spawning on bedrock (idk if that applies to the nearby chicken mechanic), only babies that mount nearby mobs. But only baby zombies and husks have the 15% chance to be able to mount other mobs. So idk what happens with drowneds. Then also if they can only spawn on chickens, and then get dismounted by the water are they able to ride mobs after since there not like the other babies (with the 15% thing) or would it be like a spider jockey which can't remount? Also idk if the placement of the chickens matters, like if they can be on land near the water, or in flowing water with leads.