All animals that have hair need to be groomed (grooming is keeping your animals clean) to stay healthy and live long.
Dogs
Short-haired dogs should have their coats brushed twice a week and might not need trimming at all! But it is safe to get a short-haired dog's coat trimmed once in two months. Long-haired dogs should be brushed daily and get its coat trimmed regularly. All dog's teeth should be brushed twice a week. You should clip your dog's nails and clean the ears to a maximum of once a week. The ear cleaning product should be showed to the vet to check. You should bathe a dog once a month.