Pakistan are now 2-0 down in the four-match series and Butt realizes if they are to salvage a drawn series by winning at The Oval and Lord's, his team will have to start holding on to opportunities.
Regular wicketkeeper Kamran Akmal was omitted after missing chances in the first test at Trent Bridge and his replacement Zulqarnain Haider dropped three catches at Edgbaston.
Several of his team mates were also offenders as Kevin Pietersen was missed three times during his innings of 80 that gave England their platform to win.
"The guys themselves realize that we need 20 wickets to win a test match and if we drop 14 catches in a test it makes it hard to do that," Butt told reporters.
"They were out in the morning working hard but one day is not enough. You need to do that continuously. These 14 include half chances and being professional we need to account for the half chances."
There were 10 clear drops.
Former Pakistan batsman Ijaz Ahmed is part of the team's current backroom staff, officially as an associate coach but with the remit to help the team's fielding.
England have former physical education teacher Richard Halsall as a specialist fielding coach while Australia have had baseball coach Mike Young helping them.
South Africa have employed one of the greatest fielders of all time in their former batsman Jonty Rhodes, and fielding expert and former Warwickshire player Trevor Penney used to work with Sri Lanka. Pakistan have not considered a specialist.
"Ijaz Ahmed was one of the best Pakistan fielders once and he is doing a good job but we need to work hard ourselves," Butt said. "A culture change in one series is virtually impossible. More than myself, the individual needs to understand what has happened and only that will change them."
Meanwhile, England captain Andrew Strauss gave unequivocal support to his opening partner and vice-captain Alastair Cook who was bowled for four by Mohammad Amir on Monday and has now failed to reach 30 in his last seven test innings.
Although he scored two centuries on the tour of Bangladesh in March, when the pitches were slow and did not encourage pace or spin bowlers, Cook's form could be giving England selectors food for thought ahead of the Ashes series, which starts in November. Cook averages 26 from 10 tests against Australia.
"Opening the batting in test cricket can be tough at times and when you are down on confidence it can be exploited more than other areas in the batting line-up, but Cooky has played some outstanding innings for England in the past, he's a valuable member of our side," said Strauss.
"I have every confidence he will come back and play some valuable innings in the near future. He's a top-quality opening bat and three or four tests do not change that. I'm not a selector but he has my full backing because I honestly think a big score is around the corner."
