Q.pear trees
I planted two pear trees about 6 years ago. Each year pears develop but are not edible. Last year they were all mushy but not fully grown. What am I doing wrong?

Fruit quality is in direct correlation with a trees health.
Pears also should be harvested before they are ripe. If allowed to ripen on the tree, they will ripen from the inside out and be mushy.
Here are some articles that will help with care information and harvesting.
https://www.gardeningknowhow.com/edible/fruits/pear/growing-pear-trees.htm
https://www.gardeningknowhow.com/edible/fruits/pear/no-pears-on-tree.htm
http://extension.oregonstate.edu/gardening/node/413
https://www.gardeningknowhow.com/edible/fruits/pear/pear-tree-harvest-time.htm