Your dog is a......
Australian Shepherd
QUICK FACTS:
Origin: United States
Life Span: 17-18 Years
Litter size: 5-10 puppies
Weight: Males: 40–70 pounds / Females: 35–65 pounds
Height: Males: 48-58cm/19-23in / Females: 46-56cm/19-23in
Fur: Straight (may have curls)
Source: Wikipedia