I have 5 goats, mixed breed La Mancha, Boer/Nubian all with horns. They all get along, each knows where they stand in the hierarchy. But at home they have lots of room to get away from each other when they get irritated. I want a good trailer for them if I need to transport all of them at once. A dealer suggested that an enclosed trailer would be less stressful for them, being more quiet and a smoother ride. It sounds logical to me, but now I'm wondering how large it should be, and wonder how my noodle-heads will get along if they're enclosed. Will a 5x8 or 5x10 be sufficient? Please help!