Chickens suffocate when under 1 block.
When I was leading chickens towards my house, they kept going under trees. Tree leaves are generally 1 block above ground level, however chickens took suffocation damage from this. To repeat the bug, just place a chicken under 1 block.
2014-03-28, 06:55 AM
2019-01-20, 09:46 AM
2014-03-28, 08:57 AM
0
1
-