Ideal Home Toby would be best suited to an adult only home or a home with older children and a family experienced with his breed. He will need to have continued training and classes are highly recommended. Breed Description Toby is a Jack Russell crossbreed, making him bright, clever and eager to learn more. He, like most Jack Russell’s will need plenty of exercise and mental stimulation; too little exercise, too little companionship and too little stimulation may lead to boredom, which, in turn, may lead to destructive behaviors.