Periodontal (gum) disease can lead to tooth loss and affects most cats before they are 3 years old. Bacteria from periodontal disease can spread to affect other organs and cause illness. One of the best ways to help prevent periodontal disease is to brush your cat’s teeth on a regular basis—daily, if he or she will allow it.

With many dogs living well into their teens, many owners wonder: When is a dog truly senior? The answer is that there is no specific age at which a dog becomes senior. Individual pets age at different rates. However, most dogs become senior at 7 to 10 years of age, and most large- and giant-breed dogs become seniors earlier than small-breed dogs.

Iguanas are among the most popular pet reptiles. They love to bask in the sun or under an ultraviolet light, and they enjoy a diet of leafy greens and vegetables. Many people don’t realize that iguanas can grow to be quite large, exceeding 6 ft (1.8 m) in length. Iguanas should be properly socialized when they are young to ensure that they can be handled as adults. They require specialized housing and regular veterinary care and may not be a suitable pet for everyone.

Like most other pets, pet birds can benefit from regular grooming. But before you get started, there are a few things you should know.

Rabbits make great pets: they are easy to keep; can be litterbox trained like cats; and can live a long, healthy life, providing many hours of enjoyment. The average life span of a domestic rabbit is 6 to 10 years. If kept outdoors, rabbits need to live in a secure location safe from predators. If rabbits are kept indoors, the house must be “bunny proofed” to remove items that rabbits could chew and destroy or that could be harmful, such as electrical cords. Rabbits need to be kept in a clean, climate-controlled environment with fresh water and good nutrition. Pet rabbits typically live longer than rabbits for commercial use, so the goals for feeding pet rabbits differ from those for production rabbits.