The Potters have won just one of their last 10 games and have lost their last three league games in a row, to teams around them in the Premier League.
"When we went 10 games unbeaten, we played exactly the same as we are now and people were jumping about," Puils told reporters.
"I haven't changed anything from the run of 10 undefeated to now. Everything in training is the same.
"We've been on a bad run but, if we can get back to what we were doing then we can end up having a great end of the season. That's the way you've got to think."
Stoke face West Bromwich Albion at the Britannia Stadium on Saturday.