Green’s Dictionary of Slang

pleased as a dog with two cocks phr.

very pleased, delighted.

1859		Surrey Comet 29 Oct. 2/7: I can see by her eyes that she is as pleased as a dog with two tails.
1873		Centre Reporter (Central Hall, PA) 10 July 4/4: He got the letter, and was just as pleased as a dog with two tails.
1884		Dly Eve. Bulletin (Maysville, KY) 15 Feb. 1/4: When I returned from the mission I was as pleased as a dog with two tails.
1895		Dly Bulletin (Honolulu, HI) 2 May 3/4: Mr Beike [...] is now seen about town [...] feeling as pleased as a dog with two tails.
1908		Beds. Mercury 24 July 7/1: He should never forget it, as he was as pleased as a dog with two tails.
1915		Bulletin (Sydney) 4 Nov. 51/2: Half an hour later back he came, as pleased as a dog wid two tails.
1917		Sun. Post (Dundee) 4 Mar. 10/3: Soapy, as pleased as a dog with two tails.
1918		Kia Ora Coo-ee 15 Apr. 18/3: I soon got fed up with it, but Bob was as pleased as a pup with two tails.
1923		Western Dly Press 13 Oct. 5/6: Rhymster Jan [...] lookin’ s’pleased as a dog wi’ two tails.
1935		Bucks Herald 12 Apr. 10/4: ‘Grampy’ West, too, is as pleased as a dog with two tails.
1947		Western Dly Press 26 Sept. 3/4: I’m as pleased as a dog with two tails.
1941		A. Gurney Bluey & Curley 22 Sept. [synd. cartoon strip] Look at him...as pleased as a dog with two tails.
1952		Wilts Times 16 Aug. 2/1: [advert] Murphy have a done it — and we are pleased as a dog with two tails.
1976		K. Clift Soldier Who Never Grew Up 45: I had ‘made it’s and as Bluey Carstairs remarked I was as pleased as a dog with two cocks.
1992		P. McCabe Butcher Boy 88: He looked at me proud as a dog with two cocks.
2001		C. Brown Bovver 106: I was as pleased as a dog with two cocks that I was on Doughty’s side and not the other way round .
2004		Spin Dec. 106: I was as happy as a dog with two cocks.
2015		M. Heyns 3 Novels in One [ebook] ‘You’re as pleased as a dog with two cocks’.
2016		N. Cummins Adventures of the Honey Badger [ebook] This bloke always has a smile on his dial. He runs around like a dog with two dicks.