This is a minor variation on the story of the Boy Who Cried Wolf where Oswald the Lucky Rabbit tends a couple of lambs who tease him by crying 'Wolf! Wolf!' until the real article shows up.
1914
1936
2009
2002
1987
1916
1898
1917
1918
1981
1968
1999
2011
2012
2013
1921
2001