Baby chickens go through one snow layer

When baby chickens 🐔 are spawned next to one snow layer, if they move into the snow, their legs are not visible. When a player goes onto that snow, they go upwards a bit so their collision box is in line with the snow.

Steps to reproduce:

1. Open Minecraft Preview 26.0.27

2. Create a new world with Cheats enabled

3. Type the command ‘/locate biome minecraft:snowy_slopes’

4. Type the command '/tp @s [/LOCATE COORDS]

5. Type the command ‘/give @s minecraft:chicken_spawn_egg 64’

6. Spawn chickens until you get a baby chicken

7. Look at the chickens sunken into the snow

Observed result:

Baby chicken 🐔 doesn’t collide correctly with snow

Expected result:

Baby chicken 🐔 walks on snow like a player or any other mob