I just bought a six month old miniature pinscher. I have read that they are stubborn to housebreak. When I take him outside all he does is sniff around and eat bugs but will eventually pee. When he comes in, he sometimes poops within 5-10 min. I have even cought him squating and picked him up and took him outside for 20 minutes but he still will not go outside. He pooped outside once and never again. I even praised him when he did it. I don't know what else to do.