Some dogs could play fetch all day long, while others have absolutely no interest in chasing a ball. Some might love "find the treat" type puzzle toys and others may completely ignore them. The important things are that your dog finds the toy interesting without becoming obsessed over it, and that it is size and safety appropriate for your dog. A Chihuahua is probably not going to be a good match to a Kong as big as she is, and you wouldn't want to risk having your Malamute swallow one of those smaller size tennis balls.
Cesar MillanOften we blame the breed, but in my opinion, it's not the breed, it's the owner. The owner has to be the pack leader and provide exercise, discipline, then affection. If you do that, you'll have a sweet, loving, and balanced dog - no matter what breed!
Cesar MillanThe dog can only become what's in your bubble. The dog is imitating the energy that is in your bubble. You are the source, the feast of energy. If you feel anxious, the dog becomes anxious with you. If you become nervous, the dog wakes up nervous with you.
Cesar MillanBreed is among the least important things about a dog. It's more important to find a dog with compatible energy and needs that will fit into your lifestyle.
Cesar Millan