Lumberjack Birthday   I refer to our three-year-old son, Hudson, affectionately as “Squirrel.”  Shortly after we brought our youngest son, Dashiel, home, I made the slip and called him “My Little Squirrel” by accident. Hudson overheard this and immediately corrected me and declared that Dash should instead be nicknamed “Chipmunk.”   From that day on “Chipmunk” or