Mob_Spawner -> Squid, Bat, Slime and MushroomCow does not work !

Mob_Spawner -> Squid, Bat, Slime and MushroomCow does not work !

The mobs did not spawn but other spawners work perfectly when you take an egg and put it on mob_spawner.

Steps to Reproduce:
1. Put a mob_spawner on the floor
2. Take a Squid, Bat, Slime or MushroomCow egg and put it on the spawner
3. Nothing spawn

Sorry for my english I normally speak French (;