 The first offering from the new company was The Ruff & Reddy Show , a series which detailed the friendship between a dog and cat . Despite a lukewarm response for their first theatrical venture , Loopy De Loop , Hanna @-@ Barbera soon established themselves with two successful television series : The Huckleberry Hound Show and The Yogi Bear Show . A 1960 survey showed that half of the viewers of Huckleberry Hound were adults . This prompted the company to create a new animated series , The Flintstones . A parody of The Honeymooners , the new show followed a typical Stone Age family with home appliances , talking animals , and celebrity guests . With an audience of both children and adults , The Flintstones became the first animated prime @-@ time show to be a hit . Fred Flintstone 's signature exclamation " <unk> <unk> doo " soon entered everyday usage , and the show boosted the studio to the top of the TV cartoon field . The company later produced a futuristic version of The Flintstones , known as The Jetsons . Although both shows reappeared in the 1970s and 1980s , The Flintstones was far more popular . 
