I have all my pets on my profile linked to by using the Username/Petname link
Alivia, for example:
"/pets/Skull/Alivia"
All of my pets are linking to a pet owned by . A Common Experiment that doesn't even seem to have a name.

I tried changing one of the links to my pet's numerical pet-id, and it said "File not found."
Unrelated, but when creating a thread, if you hit preview, it only darkens the screen. A preview isn't shown. You're unable to click out of preview and have to click back to exit, and re-type everything.