Historical clue formulations

• Four-legged friend — 2018-08-03
• Doggy — 2017-08-04
• Lab, for one — 2017-05-20
• Doggy — 2016-08-07
• Doggy — 2016-02-10
• Doggie — 2015-06-16
• Bowwow — 2015-02-18
• Doggie — 2011-01-11
• Hound — 2010-04-30
• Bowser — 2003-07-23
• One may sit for a master — 2002-09-12
• Bowwow — 2000-07-18
• Bowwow — 1996-11-10
• Kitty alternative — 1996-11-09
• Mutt — 1996-09-16