I have seen plenty of observations of domestic birds (primarily Swan and Greylag Geese) that are clearly in a park and breeding, but their observations are casual.
Why? Because a domestic ‘is not wild’, though it may be breeding and expanding in that area (for example, Muscovy Ducks in Houston).
I believe the name of this tag is causing confusion among some users. I dislike reporting domestics as casual, since we may not know where they could potentially be spreading or if they could be breeding. Changing it to ‘Captive/Cultivated?’ seems a bit more accurate.