1. Border collie
> Height: 18-22 inches
> Weight: 27-45 pounds
> Life expectancy: 10-17 years
The border collie is widely considered to be the most intelligent dog breed. In fact, it was bred for its intelligence and obedience and has tremendous herding abilities and protective instincts. The border collie makes a great pet but needs more physical exercise and mental stimulation than many other breeds.
> Height for standard poodle: over 15 inches
> Weight for standard poodle: 40-70 pounds
> Life expectancy: 10-18 years
Poodles come in different size varieties, including standard, miniature, and toy. Regardless of stature, these dogs have plenty of smarts. They are skilled at many dog sports and activities and often win Best in Show prizes at major competitions.
3. German shepherd
> Height: 22-26 inches
> Weight: 50-90 pounds
> Life expectancy: 7-10 years
The German shepherd is the second most registered breed by the AKC. Originally bred for herding sheep, it has become the first choice for many roles because of its intelligence, trainability, and obedience. German shepherd roles include disability assistance, search and rescue, and police and military work.