Behavior and intelligence of a sheep

Sheep can recognize individual human and ovine faces, and remember them for years.
So do we recognize our sherperd?

Relationships in flocks tend to be closest among related sheep
Is our relationships in the care group (CG) close?

All sheep have a tendency to congregate close to other members of a flock, although this behavior varies with breed.
Do we congregated close to our CG members?

Sheep become highly stressed when separated from their flock members
Do we feel stressed when we separated from one another a CG mates?