Which,I presume was the pilot for the series,the girls had a cat named Fluffy and the boys,a dog named Tiger.Tiger was featured in subsequent episodes(how many seasons did Tiger last?)And whatever happened to Fluffy?How many seasons did Fluffy last?

Fluffy was never seen again after the pilot episode. Tiger lasted part way through the first season. The original dog to portray Tiger was hit by a car and was killed. They tried to get a replacement but the only dog they could find that looked liked the original Tiger was a pound dog that was completely untrained and therefore completely unreliable on the set. Therefore they decided not to include Tiger in any future scripts. They did however keep Tiger's doghouse in the back yard for the entire run of the show. (it was covering a hole in the artificial turf!)