Ok. There is different race # for Regular Wolves and Spirit Wolves. Look at this picture below:
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I honestly can't remember my shaman pet pre-luclin models .. was it not actually a spirit?
If this is the case, then maybe it is something that has to be done on our end to restore shaman pet models. It would be an incredibly easy fix... Literally a matter of changing the race # from spirit wolf to regular wolf. If I get the OK to do this .. with some testing .. we will add your method to the require files walkthrough.