In 1978, the band released "Dog & Butterfly". It was very different in musical style from the first three albums. Sue Ennis was a friend of Ann and Nancy Wilson. She helped write a lot of the songs on "Dog & Butterfly". Two of the songs were named "Straight On" and "Dog & Butterfly". Heart did not sell as many copies of this album. The next two or three albums were not very good. Roger Fisher and Steve Fossen left the band.