If you really want to trained you pet dog and cat then usually the earlier the pet you will get after weaned from their mother, the faster you can teach them to learn. Animals will vary with their personality, not all the dog r all the pet is same. So you don’t have to worry about it if your pet dog or cat doesn't learn right away. Always be patients and caring loving with your pet. If after many weeks they are not learning then might be they have some mental problems. Then instantly check your pet to the animal’s vet to know about it. 

The main key to trained your cat is to make it sure that what you want to do with your cat is exceedingly pleasurable and rewarding. Don’t want to do something with your cat, which will not be fun or pleasant. Whether the goal is to groom the cat or to teach him or her a trick, it always needs to be done at the cat's own pace. Cat can be trained with some of the basic exercise like sit or how to use the cat flap or may be something with little bit complex such as giving a paw, sitting or retrieve in a mare cat position. For the dog the dog will eventually learn training phrases like “Let’s go outside” or “Let’s go potty,” said excitedly. Give a lot of attention to the Dog training and their treats. They will love to do play with you and listen to your work. So keep training your pet cat and dog to get from them an expectable one.