This one is probably a typo, but it's still the same quest only the dup defending their camp from orcs by barricading the camp. Eleanor speaking: "If they come mounted in wolves, don't think they are just like horses, they are as likely to kill you as the orc riding on top of it."
First, it should be "mounted on wolves" since they are using the animals for transport and not somehow embedded in their flesh as "in" suggests and second, I'd suggest changing the last bit to: "they are as likely to kill you as the orcs riding on top of them.", so you can keep the number agreement between multiple wolves and orcs since no single animal or rider are pointed out.