“Saddle your hoss before cussin’ the boss”

“Saddle your hoss before cussin’ the boss” is a Texas-type saying that has appeared on signs since at least 2003. The Saltgrass Steak House restaurants have such a sign in the bar area.
   
     
New York (NY) Times
July 9, 2003
In These Border Patrols, the Bounty Is Ticks
By SIMON ROMERO
(...)
“We’ve been so good at our job that our herds never became impervious to the tick,” Edwin Bowers, administrator of the tick eradication program at the Agriculture Department’s office here, said in an interview under a sign reading, “Saddle Your Hoss Before Cussin’ the Boss.”
 
24 February 2005, Dallas (TX) Morning News:
A saddle with more than a century of use sits on a stand and bears a sign that reads: “Saddle your hoss before cussin’ the boss.”
   
It’s a Love Story, Baby Just Say Yes
Monday, October 27, 2008
Winner Winner, Chicken Dinner
(...)
The restaurant itself was a sight to see…adorned on the walls were stuffed “animals” - bobcats, foxes, etc. signs that read “Saddle your hoss before cussin’ the boss” and about fifty stuffed and fake chickens everywhere!