It looks as though the distinction between absolute and qualified ownership may be a bit too subtle for some. However, this (quoted from one of Deer Initiative's legal guides) is helpful:
Ownership of deer: Deer which can roam freely are wild animals and are not owned by, or the responsibility of, anyone. A wild deer becomes the property of the landowner when “reduced into possession” i.e. killed or captured, thus a culled deer is the property of the owner of the land on which it dies, a deer killed in a road accident is the property of the owner of the highway, verge or land on which it falls. The status of enclosed deer such as park deer is not so clear, they are generally regarded as “wild” with respect to shooting seasons but in some cases may be regarded as property. There is no clear definition of farmed deer but deer which carry tags which include the agricultural holding number or which are listed as part of a farm enterprise are regarded as domestic livestock and therefore as property.
A wild deer does NOT have to be dead to be reduced into possession - that is to say absolute ownership.
It would certainly be easier if everything could be expressed in very simple terms. But the concepts of "ownership" and "wild" are more complicated that this. I am surprised that anyone thinks I am stupid for pointing this out or expressing an opinion on which someone else takes a different view - particularly as we appear to agree on most points.