Australian Cattle Dog
They are one of the most intelligent breeds, but the Australian cattle dog’s brains means they are also pretty tough to train. The breed will usually only respond to firm leaders, and they constantly need a job to do around the house or on the farm if there’s a hope of getting them trained.
Rottweiler
They’re big and full of brains. That’s right; we’re talking about Rottweilers. Although they don’t need as much exercise as any other breeds, these dogs need plenty of problem-solving tasks if you want to keep their minds ticking over. If not, you may find these dogs become destructive or try to escape.