Cam that's why I fed it because it's a natural way to help make sure an animal (who is already not suffering from a bad worm infestation) gets a little preventative in their diet. We just need to repeat things like this for those who might have only just joined. We don't want anybody thinking they can use pumpkin and not have fecals done or work with a vet.
Your organic pumpkin I would guess would be all pumpkin. Most products have a phone number or email address where you could contact them and ask.
As for how to fed it, like everything else your just going to have to try it on your animal. Some of mine will eat the chunks just fine. I do have a couple who want it shredded. Then there are three that won't touch it. Of course those are the three I would really love to have running the pumpkin thru their system.

They are my Homes who don't need anything stressful, they are shy and don't enjoy handling, and they are experts at enclosing themselves up in their shells.