I have heard that you can overprune an apple tree. I think that you need a reward when you prune so that you do NOT fear killing your tree! I break the small pieces into ~2 ft and take them to my firepit to enjoy. We ALWAYS have paper garbage from our Law Office, primarily bc DH insists on hard copies of the local paper every day, and every mistake is ripped into two and we burn it, so that goes in first, then anything else.
I have come to understand that fruit trees are programmed to replace the fruit and the shoots that are naturally chewed on by animals (in the wild) so that the next generation of fruit will survive. HowEVER, to produce a species of fruit, they are all grafted and many will cross-pollinate, so if you manage to start one from seed, it will most probably NOT be the same fruit as the parent.
http://pss.uvm.edu/homefruit/hfgprop.htm
My mission for my apple trees and my one pear tree is to prune small fruit this year to keep the limbs from breaking. Ironically, my pear tree, which suffered blight in 2016 is loaded with blossoms this year. In 2015 I got about 50 wonderful and sweet Bartlett pears, and I would like to keep it going.
I even hacked off 3/4 of my grape vines in March. Then I watched a program about an organic orchard and they only had growth in the center of the top of the vine and then the owner pinched off some of That for "good air circulation." I do have good air circulation and I figure that, yes, I killed off 1 vine, but the previous owners never pruned and THEY killed off 2 of the vines. You can see that the stakes are set up for 8 grape plants and there are only 5 left. I may try using my tree pot method and buy some grape starts in it and put them in in the Fall when DH and I replace the two wooden supports at the end that are rotten and broken off. This pot is about 2 foot deep and really allows for deep root growth, especially if I use aged compost to start them.
As I reported before, the 8 peaches, whose blossoms survived a record May 18 HARD FREEZE in 2016, were huge and magazine perfect. I have over 50 blossoms on this tree this year and I may have to snip off a few if I see too many on one branch.
Growing up in suburbia doesn't teach you this stuff!!