Up until yesterday, however, my male setter, who is still just a pup, had not encountered a porcupine. I was out quail hunting and noticed that Ozzy, who was running about 150 yards out in front of me, suddenly wheeled around and tentatively sniff around a soapweed (yucca) bush. He craned his neck, took a sniff of something, then just as abruptly turned away and went back to hunting as if nothing had been there. Dogs, of course, do this all the time. Mice, box turtles, bones; young dogs will flash point or investigate just about anything.