Had NO idea Himmler was an erstwhile chicken farmer. Amazing. As to him being the one, without looking it up all I can say is I trust your memory. It sounds right to me.
He was a chicken farmer who couldn’t stand the sight of blood.
Once when he visited an SS unit that was liquidating Jews, pre death camps, he was invited to witness the efficiency of his troops.
As the SS was shooting the people a few drops of blood splashed onto his pants and he nearly hurled on the spot.
The mass murderer couldn’t stomach a few drops of his victims blood.