degbunke asked an interesting question in a comment down below:
This might be a litte off topic, but can you use blank space in your pet’s name, and/or capital letters? For example “My Pet” or “MyPet” instead of “Mypet”. I think I’ve seen pets with blank spaces and capitals in their names, but I’m not sure.
I’ve never played around with pet naming — my pets are generally named something simple like Cloud or Banshee — but I know they are different than character naming rules. I’ve seen pets with much more flexible names, with caps and all. Does anyone know exactly what the rules for naming your pet are?