If you're looking for a pet with certain personality traits, it's more likely that you'll find the right companion to fit your lifestyle if the candidate is at least six months old. If you don't have the patience or energy for a teenager, you should consider an adult dog or cat that is at least one year to eighteen months old. Dogs and cats this age learn quickly, have more coordination and control over their physical functions, and have more predictable natures. You then need to determine whether a baby animal or a mature pet is more appropriate for your lifestyle and your expectations for this new member of the family. Most adult pets can easily adjust to your schedule, however, they also need time to learn what is expected of them.
Some dogs never grow accustomed to being left alone.
If the child is under six years old, the pet should be over four months old. Puppies and kittens play roughly, and without careful supervision and training, both your child and your pet could have a bad experience with potentially serious consequences. An adult pet is usually past the stage of becoming overly excited, and you can better gauge how hardy and tolerant he'll be toward childish enthusiasm. It's your responsibility, to your pet and to your child, to monitor their interaction. You can help to strengthen the relationship between your pet and child by showing your respect for your pet's needs and feelings.