 Dobbie's debuted on 19 March 2005, as a 57th-minute substitute in a 2–0 defeat to Ross County at McDiarmid Park and Dobbie scored his first goal in a 4–0 win over Partick Thistle at Firhill on 16 April 2005.Dobbie had eight appearances for the club that season, scoring two goals.The transfer to the Perth club was permanent in 2005 close season, going on to have 27 appearances, scoring 5 goals in the 2005–06 season.