Making lunch I noticed a pattern with the olives I was adding to the salad. So, I tried to play tic tac toe with Max... 
He kept eating the olives, so in the end I had to place them for him - and  of course greens got the first line so I won, hee hee......

Gosh methinks I have  too much time.... Mr Google says olives aren't poisonous to dogs but I still only let him eat the one!