The following are the biggest percentage decliners on the TSX Venture Exchange in mid afternoon trading with their price movements INTERNATIONAL SOFTROCK OIL (SOF.V), $0.10, 0.09, 47.37% CANYON CREEK FOOD (CYF.V), $0.0850, 0.0650, 43.33% NEWCASTLE ENERGY (NGY H.V), $0.0850,