I still haven't worked out how dogs know that snakes are dangerous. My two outside dogs, born and bred in the area, will jump 2 metres sideways if i shake the garden hose as they pass it. They certainly have a special bark when they come across one and it's normally from a good few metres away. But like RBB's they think goannas a fair game. It would have been a fair size brown MP, not sure I'd like to winkle him out from under stok feed sacks.