As they think the sheep in front knows where the tastier grass is growing.
No
They are facing each other
Sheep organs and human organs are actually not that different from each other. They both have the same functions for the animal.
Fear is a great motivator: See the sheepdog trials held each year. Every time I've seen sheep out with the shepherd, the shepherd is DRIVING the sheep along, they are not blithely following him. And some of those sneaky shepherds use goats to lead the herd of sheep, so they only have to lead the goat or goats.
There are hundreds of sheep killed each year for food. The exact number of sheep killed varies from country to country.
Counting each other.
they don't
No, sheep are neither carnivores nor scavengers, they do not eat each other.
A black sheep is one which does not do what all the other "sheep" (people) do - a person who does not follow cultural laws and morals, but does whatever they want.
it has no 6th sense
No
Yes, lemmings do follow each other, but in a way that is similar to all animals that move in groups or herds. The myth that lemmings will follow each other over a cliff is simply a myth.
They are facing each other
if your planning on getting a sheep i would get 2 or 3 to keep each other company but yes
pheromones
Consecutive
Yes, actually I have both horses and sheep, although they are not near each other. At first if the horse walks towards the sheep, the sheep may run away because sheep run away from pretty much anything. And maybe the same thing will happen with the horses. They will probably just ignore each other. Always make sure you are watching over the introduction.