Pavlov's Dog was composed originally of vocalist David Surkamp, guitarist Steve Levin, keyboardists David Hamilton and Doug Rayburn, bassist Rick Stockton, drummer Mike Safron, and violinist Siegfried Carver (born Richard Nadler).

For their second album At the Sound of the Bell (1976), Tom Nickeson was added to the line-up on guitar; he switched to keyboards following the departure of Hamilton.

A raft of guest artists contributed to the album, including jazz saxophonist Michael Brecker and Roxy Music's Andy Mackay.

The third album finally was titled Has Anyone Here Seen Sigfried?, remastered, appended with 10 bonus tracks of unreleased material from the 1970s, and released legally in 2007 by German label Rockville Music.

[2] Label owner Jerry Dennon got into legal trouble with the US Justice Department as part of a master tape tax shelter scam.

This line-up toured Europe annually in 2005 and 2006, playing the 2006 Arrow Rock Festival in the Netherlands in front of 54,000 people.

In 2008, David Karns, Bill Franco, Michael McElvain and Andrea Young were unable to return due to previous commitments (Karns and Franco playing with Anthony Gomes, Young playing with the Reverse Cowgirls and McElvain finishing his graduate music studies).

To fill the spots, the Surkamps hired Phil Gomez (keyboards), Randy Hetlage (lead guitar), Abbie Hainz Steiling (violin), and saw the return of Rayburn, playing bass.

Bill Franco was asked back on lead guitar and Nick Schlueter was brought in to handle keyboards and mellotron parts, reducing the lineup to seven members.

This lineup toured Europe from 2009 through 2012, playing its most extensive tours to date including the band's first dates in the U.K. and the Fiesta City Festival in Verviers, BE in 2012, sharing the stage with the legendary Blues Brothers Band (Steve Cropper, "Blue" Lou Marini, Donald "Duck" Dunn, et al.).

During this time, Nick Schlueter exited the band, and after auditions, Nathan Jatcko was brought in on keyboards for the 2015 tour through Europe.