Those are some great looking trees, I'm jealous. I also had a bear prune some branches last year when my first trees finally produced apples, but I got back at the bear population when I drew my bear tag.
I found a giant wild crabapple at our new place in SE MN that has fruit very similar to your dolgo, but my fruit was just a little darker in color. I need to get a picture to share with everyone, but the tree has to be pushing 25 feet tall and after releasing it from competition it had hundreds or possibly thousands of pounds of fruit last fall.