Don't know if anyone else knows this, but there are some maggots in the Dread Wastes that are tameable right now. I'm guessing it's not intentional, but it's still possible nevertheless.
There's three NPC's there, the needleback porcupine, bonedust moth, and bluehide mushan that will spawn some orange maggots once you attack them. And they're tameable. When you have tamed them they're huge.

They're considered worms, so only beast master hunters can tame them.
Location:
I'm sorry if this has already been mentioned, but I couldn't find any posts about it.

I'll be waiting on the highland, with its wonderful serenity.
Where the stars glow and the brooks flow, that's my way of life.
When the mountains on the highland, and the nature is surrounding me, when the wind blows, that's all I need.