The tents of cattle, i.e. the dwellers in tents, which were either a part of Zerah's company, or joined with them, or had come along with them to furnish that great host with necessary provisions, which their custom of dwelling in tents made them more capable of doing.
Related Commentaries of 2 Chronicles 14:15
2 Chronicles 14:15
15 They smote also the tents of cattle, and carried away sheep and camels in abundance, and returned to Jerusalem.