Answer: Razor
Razor was a black gelding quarterhorse mix and generally just used for McCain's often rides to town.
From Quiz: Famous Cowboy Horses' Names
Answer: Topper
After acquiring the white stallion, Boyd asked his wife to name it. She was reading the Topper books by Thorne Smith at the time, and the rest is trivia.
From Quiz: Noble Steeds IV: TV and Film
Answer: Mare
The Wikipedia "Francis the Talking Mule" website states, "The actual mule who appeared on-screen was not a male at all, but a female named Molly, selected because she was easy to handle." A mare is a female horse or other equine. (If all females in America could produce such income as "Francis the Talking Mule" series did, America would be a wealthy nation.)
From Quiz: Horse Talk
Answer: "Riding the horses was the most fun you could have and we just loved it so."
Arnette Webster was Sonora's little sister. She joined the show and made her first dive when she was fifteen. She also stated "We didn't want to give it up."
From Quiz: Diving Horses
Answer: Thunder
Thunder, a jet black quarterhorse stallion with four white stockings, was a formidable partner for Red Ryder. As a side note, Little Beaver rode a small pinto named Papoose.
From Quiz: Famous Cowboy Horses' Names
Answer: Black Diamond
Lash also had a black horse called Rush.
From Quiz: Noble Steeds IV: TV and Film
Answer: Diablo
Diablo was a black and white 'paint' horse. (Loco was the horse of the Kid's sidekick, Pancho.)
From Quiz: Noble Steeds IV: TV and Film
Answer: Rex
Poor Rex was consistently upstaged by the real star of the show, Preston's faithful dog Yukon King.
From Quiz: Noble Steeds IV: TV and Film
Answer: Comet
A conceit of the show is that Brisco and Comet can converse together, and that Comet is if anything more intelligent than the show's human hero, for example regularly beating him at chess.
From Quiz: Noble Steeds IV: TV and Film
Answer: Midnight
The horse's real name was Harvester.
From Quiz: Noble Steeds IV: TV and Film
Answer: Buck
The Buck of 'Gunsmoke' was in fact the very same Buck as was ridden by Ben Cartwright in 'Bonanza'. Lorne Greene actually bought Buck (whose real name was Dunny Waggoner) when the 'Gunsmoke' series ended.
From Quiz: Noble Steeds IV: TV and Film