Check their teeth
The accumulation of plaque can cause the same problems for dogs and cats as for humans. It can result in inflamed gums, which is not just painful but can also cause teeth to fall out. So, it's important to look after your dog or cat's teeth. For example, you can ask the vet to clean their teeth every year. There's also special pet toothpaste and snacks that a dog or cat can chew on to clean their teeth.
If your dog or cat has bad breath and stained teeth, it's advisable to consult the vet. Red gums can also indicate gum infection. A healthy dog or cat does not have bad breath, so this may be a sign that their teeth need seeing to.