Disclosed herein is the use of a cashew nut shell liquid and/or an active component of cashew nut shell liquid for the manufacture of a bloat and/or acidosis controlling agent for the control of bloat and/or acidosis in a ruminant. Also disclosed is a method of controlling bloat and/or acidosis of a ruminant, comprising administering cashew nut shell liquid and/or an active component of cashew nut shell liquid to a ruminant.