Max the Airedale (20 months old) has killed two chickens this morning. I'm still in shock. After walking him for two hours, I came in, made a cup of tea, leaving him to wander in the yard and the fields (as he does a lot of the day normally). When he didn't come to the whistle (unusual) I went to look for him and as my husband returned from golf, heard me whistling two fields away. 'He's in with the chickens' I heard him shout. Two dead. Three hiding but ok.The chickens are in a side garden to the house, surrounded by a Cornish hedge (stone walling with vegetation on top). My husband is now off to buy yet more chicken wire (we'd already done the gate to the chicken area and the one and only spot we thought was vulnerable). Max is (usually) a lovely dog who is training well at classes. Now, I suppose it's just a case of instinctive behaviour but does anyone have any ideas of how we can 'chicken-train' Max as well as securing the chicken area now that he may have the taste for them. Thanks.