He trusted that nothing could get over the spiked wall unless it was airborne, but many things lurked on the plains which could slink in, unseen; besides, if a group of Serraptors ever decided to charge the barrier, they may well get through, and he would prefer not to be on the front line of such an assault.
He removed his shades as he entered his tent, and laid them on the small set of drawers which passed as his storage.