Many breeds of dogs are used for work. In many cultures dogs are used to herd sheep. The dogs keep the flock from being attacked by animals such as wolves. They also keep sheep from wandering off. Sheepdogs are known for their loyalty and gentleness. Based on your reading of the text, you can INFER that:

a
Sheepdogs are not very smart dogs.

b
There are many breeds of dogs.

c
Sheepdogs are gentle and loyal.