I have a 16 week old shih tzu who really doesn't like going very far from home. I took him out before he had his vaccinations by carrying him around so he got used to the sights and sounds. His first week out walking went well, he seemed happy and enjoyed his walks. Ever since then though he really doesn't want to go much further than around the block, he gets so far then stops and refuses to move. He gets excited when I get out his harness and lead and seems really keen to go. I've tried carrying him him further away, I've tried giving him treats, I've tried pulling him a little way but he only seems to want to walk close to home. Anyone else had experience of this? Will he grow out of it? What's the best way to deal with it?