Sniffers bug on Realms

Sniffers is the new animals on minecraft so we decided to find sniffer eggs at ocean warm and then when we have one of sniffer egg, i place it on the floor and then we waiting for it to hatch into the egg and when the egg hatch, i thought he vanished because he isn't respawn yet and me and my friend heard the not familiar sounds so i decided to download realm world to spectate and look for Sniffers and i dont see anything and when i search his name in the crafting table i can see only blank