That is the single most important reason why all of our trucks look like they can drive thru a reinforced concrete wall without taking much damage. We did run into one of those herds you speak of, the mess was quite impressive - thankfully we had the big truck so we only lost one headlight IIRC, but the aftermath was not a sight for the faint of heart, kinda felt bad about whoever would be driving thru there shortly afterwards and had little children aboard. Wildlife strikes are also why we recommend anyone who plans on traveling far away from home with a camper or trailer of any kind to equip their vehicle with the strongest front bumper they deem reasonable, as in case of an accident they now have either two vehicles to deal with (truck AND trailer), or a single vehicle that requires a fairly specific tow truck to be sent for it (loading a truck with a big slide-in on a rollback, not just no but he** no).
Oh, and since this is a diesel truck, and will have some decent grades to descend with a somewhat heavy load behind it, take a look into what it would cost you to have an exhaust brake installed. It's not the end-all-be-all solution to mountain passes, and it's never going to be quite as effective as the compression-release engine brakes the big trucks have, but it sure will make the ride down the mountains safer, and also quite a bit less stressful for someone who's fairly new to that experience (which also amounts to more safety, as a stressed-out driver is generally-speaking an unsafe driver).