Cyanide
Like other species of the Prunus genus, the seed kernels of the almond fruit contains amygdalin, a cyanogenic glycoside that can release toxic cyanide through the action of a beta-glucosidase. Kernels and almond oil meal must therefore be cooked thoroughly before being used as feed.
Mold contamination
Almond hulls are sensitive to moisture, and thus to subsequent heating and molding during storage (Asmus, 2015; Miller, 1949).