I'll get back to that.
Will take some time digging through the german Jagd und Hund forums.
And right now i'm busy with work and organising the driven hunt we have in Germany this weekend (40 rifles, on boar, roe, reddeer).
Ok, i've looked and can't find it.
There are just 20k active users or so on the "Wild und Hund" forums so there are a lot of posts to work through.
Google helps a bit when using "bleivergifteten" Seeadler"" as a query.
Driven hunt was ok btw, just 8 boars and 3 roedeer. We hoped for more, but alas. Diana decided diferently.