SACRAMENTO, CA— Obeying the instincts bred into him by millions of years of evolution, Shiner, a 2-year-old golden retriever, incurred his owner's wrath Monday by acting like a dog. "Stop barking at that damn squirrel!" Terri Solanis shouted at the dog. "Can't you sit still for five minutes?" Solanis has previously scolded Shiner for sniffing feces encountered on the sidewalk, licking his own groin, and wolfing down his food.