Describe the bug
The hippo's have shrunk, I dont know what caused this because they used to be a normal size
when I spawn them in a seperate world they are the normal size

Steps To Reproduce
I have no idea

Screenshots

Version (please complete the following information):

• Minecraft version: [1.16.5]
• Version of the mod: [1.5.4]
• Additional mods:
  

I created a backup of the world and went into creative and spawned a hippo is and the one I spawned is normal sized and the one I have is still really small

Did you update the mod in an existing world from a (very) old version? because this will 100% happen if you do so