This mod needs all these heads etc to be added as genes for xenotypes for the Biotech DLC instead of just placing heads on pawns. I tried playing with this mod on 1.6 and the heads replace already made pawns with full xenotypes finished. Like for example, a ferret head gets placed on a Holstaur. Or a rat. Or a human. There is not distinction where one of these heads will be placed. As far as I have seen. Sometimes just replacing a full race of Bun's males with a head from this mod.

It would be cool if this mod was redone with Biotech and xenotypes in mind.
But overall thank you for making the mod regardless! It's pretty awesome!

Edit: A good mod is Anthrosonae I have found.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2902258418&searchtext=anthro