Google Sez you gotta kill regular turkeys until one spawns.
Not sure why you want to spawn one, but the area at the entrance to Daemon temple on Fire Island has a large spawn of turkeys. I did accidentally spawn one there once when killing turkeys for feathers to make arrows. I wished I hadn't.
They spawn anywhere turkeys spawn. That mechanic is always on.
You should rename the post for: Heretic Hunt; the no risk all reward chapter.
When your playtime is 80% preparation vs 20% playtime if u don't bot, or how to tell me you are playing UO under mythic/BS.
If you have 5 bonded pet turkeys and rez kill them over and over again can you get a giant turkey to spawn?
Ill never try that but, that turkey left the game when it was tamed.
So, a confident no.