حَتَّى إِذَا يَئِسَ الرُّمَاةُ وَأَرْسَلُوا غُضْفًا دَوَاجِنَ قَافِلًا أَعْصَامُهَا
When the archers despaired of shooting her, they released trained, droop-eared hunting dogs, marked with their straps.
Rumāh are archers, ghuḍf droop-eared dogs, dawājin domesticated or trained animals, and aʿṣām their straps or markings.
The action shifts when archery fails and the dogs are sent in. The distant sound of humans becomes an immediate physical threat.