So sorry you lost the other Spitzies.
Moving to a new place is stressful so I always try to introduce in pairs or more. Last year I sold a hen and pullet to someone. In my backyard, the hen wouldn’t have wasted her time with the pullet. Not friends nor enemies. But once moved, the two became BFFs in the new flock.
Likewise we took a few birds to a show a 2 years ago. Because I had them in quarantine together before and after, they became buddies during that period.
I’m not sure if you can force a chicken friendship but it seemed to work for me. (Mine were not bullied - just not close prior to being caged together. ). Perhaps a more docile bird from the flock can be housed one to one with the Spitzhauben. Once they bond a bit, reintroduce both into the flock.
