Any parasite evidence?
Indeed I think it's well documented that this 'corkscrew' antler abnormality is often associated with parasitical infestation inc lungworm. With the chronic liver fluke we had in the roe in the last 2 years I saw no obvious related deformation though.
6.5 - have you seen more than the normal amount of oddities of the same piece of ground? I ask as a friend (on this site) has a dining room full of roe abnormalities nearly all from one particular estate - many of them are 'corkscrew' so indeed it must be a genetic trait - like the Jura 'Cromie' reds.
Did you check the lungs for lungworm? On the second head most likely damage in velvet as it was just the one side IMHO.
Very interesting head
Good point, I see you reside in Berkshire nor did I see any when I lived in Wiltshire! The cases of lungworm=corkscrew I have heard of were all in SW Scotland - I guess, like so many other diseases esp bronchial ones the wetter areas suffer more? Very thin long light coloured threads seen when lungs dissected with, in worse cases scarring on the exterior, I've only ever seen them in Scotland and NW England.