I haven't planted sunflowers for several years, mostly because I just plain forgot about them! But I remember one year when we had some really tall ones close to the garden fence. We have a high fence, because of all the deer. One day a moose strolled through the yard and stopped to reach over the top of the fence and eat some sunflowers. It was quite impressive!
Oh, that would have been impressive!!! Moose are huge!!