A new Regimental Standard is up today as well, talking about what you should do if you do encounter this new type of creature. It appears the first rule is........ Put the miserable creature out of its misery, followed only be dont eat it.
Here is the latest.....
This is an excerpt, please head over to the Regimental Standard for more details.
https://regimental-standard.com/2017/01/25/new-traitor-spawn-creature-most-pitiful-yet/
Such creatures represent little threat to a trained guardsman, and the best course of action is to just put the pitiful thing out of its misery – a few swift shots to the head should do the trick. Such creatures can sometimes be too stupid to notice they have been expertly killed however, so just to be sure, we recommend doing this in conjunction with some other guardsmen** (and maybe a Baneblade).
Note: Despite the fact this creature has a notionally avian appearance, upon it’s death, we would strongly caution against eating it. It in no way tastes like chicken*** and is likely to react badly with your internal organs. Such abominations remind us to be thankful that our standard Imperial rations contain only healthy organic**** constituent parts.