A mulberry fruit. Photos by Flickr/Jep . It's the height of summer, and the mulberry tree at the back of our house is filling up with succulent morsels of deep purple goodness. Every morning, I try to harvest all of the ripe ones within arm's reach and leave the ones I can't reach to the birds and to the annoying neighbor's chicken (or should that be the neighbor's annoying chicken - think I am just going to feign ignorance) when they drop to the ground. My fingers are stained purple as mulberries tend to bruise easily when ripe, and…