I'm trying to train her to lie down. I taught her how to sit in 5 to 10 minutes using a leash, but she's too stupid to comprehend down. I put her on a leash, either present or not present food, say down, down, DOWN, gently lay her down on stomach, say good dog, and give food. I've done this at least 50 times and it's getting really frustrating. Are all dogs this dumb? The first time we go through the training, I'll tell her to sit, which she does, and then go through the steps of teaching her down. Once I give her the food, she gets up, but stays in sitting position. I have a feeling she doesn't even realize that I'm trying to teach her something new. In other words, she thinks I'm rewarding her for sitting.