A: Household pets: many small animal transport services
use a van with stacked cages; there may be up to 20 animals in there. Would you want to be the only kitten with 16 barking dogs? We consider your animal's mental well-being, and ALWAYS act in the best interest of the animal. We limit our loads to a maximum of 3 families; usually fewer than that depending on the size and number of animals being transported. We have no problem pulling over and cuddling a frightened animal.
Livestock and large animal transport services often have trailers that will transport 6 or more horses; a full trailer enables them to offer lower prices. Problem is, if the trailer isn't full, they may postpone, cancel, or just not show up. Then, a 500 mile trip turns into 3-4 days on the trailer while other horses are picked up/dropped off. We specialize in DIRECT animal transports. I only postpone/cancel in cases of bad weather when travel is unsafe. I actually delivered a pregnant cow while I had pneumonia--paid a friend to do most of the driving. We stop every 3-4 hours with livestock to refill hay, give fresh water, a treat, and some TLC.
Your animal deserves better than to be treated as "part of a load".