I'm pretty sure you're right, John. Even though I'm a grower, I've never known a lot about fruit trees. From what I've heard, you prune in the fall, and spray dormant oil spray in February (in our climate).
I got a laugh at your comment about the squirrels. We live in the country, and are surrounded by ancient oak trees, and also have a persimmon and a walnut tree. As a result, we have no less than 4 squirrel nests in our trees.
They eat all kinds of things, including the cedar siding on the uppermost north corners of my house, which is up in the treetops, and the alcohol soaked maraschino cherries and orange slices from leftover party drinks on my deck.