Kitson failed to find the net in 11 starts and six substitute appearances for Stoke after a £5.5million move last July.
The 29-year-old's misery was finally brought to an end with a move back to Reading this week and he could start for the Royals against Ipswich on Saturday.
Pulis said: "Dave is a good player but sometimes it happens where players come in and it just doesn't go for them.
"It could have happened for him and I'm just hoping he goes back to Reading and gets his confidence back.
"Dave's back with a manager he knows in Steve Coppell and he just needs to score a few goals.
"He will be on loan until the end of the season and we will see where it goes. No doors have been closed."