Please note: Ask your vet before doing giving this to your cat. This email does not intend to diagnose or treat any disease or condition; I am seeking personal experiences only, as this is very common in Brasil, but I haven't seen it in this forum yet.
In Brazil Pumpkin seed is a very popular natural dewormer, especially for tapeworms - has anyone here ever used it on their cats? Below is the recommended quantity and instructions:
Pumpkin seeds, freshly ground: Try to grind up pumpkin seeds finely right before feeding as opposed to grinding them several days in advance. If you must grind them in advance, keep them in a sealed container in the freezer and take out a day's portion right before feeding. You don't want moisture to enter the seeds. The seeds need to be raw, not baked and salted. Give 1/4 to 1 teaspoon per meal to your animal, depending on size (a cat will get 1/4 teaspoon, but a German Shepherd would get 1 teaspoon). This is effective against tapeworms and very safe.