I have my first pup for 5 days now. He's 9 weeks and totally sweet. He behaves quite well, learns very quickly (Sit, Come) when given a treat. But I'm getting a little bit depressed - he doesn't like to pet! He even doesn't wag his tail when I'm approaching. He wags his tail to visitors or when excited over a toy. But not at me. He doesn't like to cuddle, just sniffs my hand for treats. I use playful intonation in my voice, I smile, but his tail won't move. He looks like he doesn't understand my language. I suspect that the breeder didn't spend much time with the pups. Or am I somehow wrong?