It is widely accepted that animals can provide emotional benefits to people.
The animal also provided a long, coarse wool which needed to be harvested twice a year.
For more than a minute the animals provided the only sounds.
The animals provided milk and meat that would have been far too expensive to import, even in normal times.
Dead animals would also provide food, and in the past perhaps, the moss had not waited for the beasts to die.
"Different animals provide different ways to view the world," he said.
Neither birds nor animals provide the kind of companionship he needs.
Chapter 7 of the same book reports on the help that animals can provide to children with autistic-spectrum disorders.
But there could be an unsophisticated one: Let animals provide the early alarm.
However, animals could not provide a complete model of human disease.