I made a right balls up.  Got some pills for the cats today that cost a tenner.  They go berserk for tinned tuna so I crushed them and put them in that.  Normally 3 massive gulps and it would be gone.  Er no - looked at it, looked at me as if to say 'yeah right' and then went out the cat flap! £10 down the drain - knew I should have bulldog clipped the little buggers!