A Gardeners Forum Forums General Discussion The Food Garden Forum Fruit Forum Pumpkin plant is good but no pumpkins

I'm growing 3 different types of pumpkins for the first time this year and although the plants themselves are growing great and have multiple blooms, once the blooms have been there for a few days, they just fall off which of course means no fruit. The stems where the bloom was look as though it has been eaten/ bit off. What would be doing this or is it normal? I posted a couple pics showing the stem and a another one showing the blooms.

Those are male blossoms, they fall off. The female blossoms have a bump on the end.