The official commentary included in the CD set Celebrate: The Three Dog Night Story, 1965-1975 states that vocalist Danny Hutton's then-girlfriend June Fairchild suggested the name after reading a magazine article about indigenous Australians, in which it was explained that on cold nights they would customarily sleep in a hole in the ground whilst embracing a dingo, a native species of wild dog. On colder nights they would sleep with two dogs and if the night was freezing, it was a "three dog night".
The band started in 1968 with three lead vocalists, Danny Hutton (who got his start with Hanna-Barbera Records in 1965), Chuck Negron, and Cory Wells (who landed a recording contract with Dunhill Records). They had made some early recordings in 1967 with Brian Wilson and initially went by the name of Redwood. Shortly after abandoning the Redwood moniker, the vocalists hired a group of backing musicians – Michael Allsup on guitar, Floyd Sneed on drums, Joe Schermie from the Cory Wells Blues Band on bass, and Jimmy Greenspoon on keyboards–and soon became one of the most successful bands in the United States during the late 1960s and early 1970s.
Three Dog Night earned 13 gold albums and recorded 21 Billboard Top 40 hits, seven of which went gold. Their first gold record was "One" (US #5), which had been written and recorded by Harry Nilsson. The group had three US #1 songs,: "Mama Told Me Not to Come" (Cory Wells on lead), which was also their only Top 10 hit in the UK; "Joy to the World" (Chuck Negron on lead); and "Black and White" (Danny Hutton on lead). Coincidentally, each one featured a different lead singer. Dunhill Records claimed 40 million record albums were sold by the band during this time period.