“Roosters crow, but hens deliver (eggs)” is an old saying. “Politicians and roosters crow about what they intend to do. The difference is, roosters deliver what they promise”—that is, the sun always comes up after the rooster crows—was cited in a 1991 newspaper.
 
American banker Frank A. Vanderlip (1864-1937) has been credited for the saying about politicians and rosoters, but there is no evidence that he ever said it.
 
 
28 October 1978, Payson (AZ) Roundup, “Pine-Strawberry News” by Bob Ritter, pg. 21, col. 1:
Politicians are like roosters. To hear ’em crow, you’d think the sun was rising especially for them.
   
Newspapers.com
16 February 1991, San Bernadino County Sun (San Bernadino, CA), pg. 15:
Politicians and roosters crow about what they intend to do. The difference is, roosters deliver what they promise.
     
Google Books
The APEA (Australian Petroleum Exploration Association) Journal
Volume 32, Part 2
1992
Pg. 37:
Towards the end of his interesting and fact-filled address, Dick Wells chose to remind his audience of remarks attributed to an American financier that, and I quote his quote: “Politicians and roosters crow about what they intend to do. The roosters deliver what is promised ”
   
Google Books
The Speaker’s Book of Quotations, Updated and Revised
By Henry O. Dormann
New York, NY: The Ballantine Publishing Group
2000
Pg. ?:
Politicians and roosters crow about what they intend to do. The roosters deliver what is promised.
(The quotation below this one is credited to Frank Vanderlip.—ed.)
 
14 October 2007, Salina (KS) Journal, “The Journal’s Opinion Line,” pg. A9, col. 1:
“Politicians and roosters crow about what they intend to do. Only the rooster delivers what he promises.”
 
Twitter
George Lundquist
‏@aphorisms
Politicians and roosters crow about what they intend to do. The roosters deliver what is promised. - (anonymous)
3:00 PM - 15 Nov 2010
 
Twitter
Stephen W Van Dop
‏@StephenVanDop
“Politicians and roosters crow about what they intend to do. Roosters deliver on what was promised.” Anonymous
11:30 AM - 3 Nov 2012
 
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Stellenbosch Political Science Students Association
November 7, 2013 · Stellenbosch, South Africa ·
Frank Vanderlip an American financier once said ” Politicians and roosters crow about what they intend to do. The roosters deliver what is promised.”
   
Times-Herald (Vallejo, CA)
Tom Smith: Roosters deliver
POSTED: 09/18/15, 4:57 PM PDT
(...)
Just what gives with these left-wing Democrats? Perhaps the old saying: “Politicians and roosters do crow. But the roosters deliver what’s promised.”
— Tom Smith/Vallejo