Hoping to increase their winning streak the Texans played on home ground for an Inter-conference duel with the Cowboys. Houston took the early lead in the 1st quarter when kicker Neil Rackers hit a 24-yard field goal. Then they fell behind with RB Marion Barber getting a 1-yard TD run, followed by kicker David Buehler's 49-yard field goal. The Texans struggled further in the third quarter when QB Tony Romo completed a 15-yard TD pass to WR Roy E. Williams. Houston replied with Rackers nailing a 30-yard field goal, but Dallas continued to score when Romo found Williams again on a 63-yard TD pass. Then David Buehler made a 40-yard field goal. The Texans would finally score when QB Matt Schaub made a 7-yard TD pass to WR Kevin Walter.
Question: How many yards shorter was David Buehler's second field goal compared to his first?
Answer: 9