code: public function initLogging()
      {
          $helper = Mage::helper('sheep_debug');
          $this->logging = Mage::getModel('sheep_debug/logging');
  
          $this->logging->addFile($helper->getLogFilename($this->getStoreId()));
          $this->logging->addFile($helper->getExceptionLogFilename($this->getStoreId()));
  
          Mage::dispatchEvent('sheep_debug_init_logging', array('logging' => $this->logging));
  
          $this->logging->startRequest();
      }
docs: Initialises logging by registering commong log files