My puppy is constipated!?

I heard i should give her canned pumpkin but not the pie filling. 100% pure pumpkin right? Is this the right one? a href="http://finance.yahoo.com/news/P-the-pie-Canned-pumpkin-apf-2590004869.html?x=0&.v=6"http://finance.yahoo.com/news/P-the-p…/a im not sure cause it has a picture of a pie.