Dental Health

Chew on This: A Complete Guide to Guinea Pigs’ Teeth

guinea pig teeth

From their adorable squeaks to their love for cuddles, guinea pigs have easily squeaked their way into our hearts. But did you know that one of the keystones to keeping your furry friend happy and healthy lies within their mouth? Yes, we’re talking about guinea pigs’ teeth. 

Just like humans, guinea pigs need proper dental care to maintain their overall health. Their teeth continuously grow throughout their life, and lack of proper care can lead to a variety of dental issues that impact their health. 

In this comprehensive guide, we’ll nibble away at everything you need to know about guinea pig dental care so that you can make sure your pet stays in tip-top shape.

Overview of a Guinea Pig’s Teeth

Guinea pigs have unique dental anatomy that has evolved to suit their plant-eating habits. Their teeth are specialized for their fibrous diet of grasses and hay.

At the forefront of their dental anatomy are the incisors. These front teeth are used for grasping, cutting, and manipulating food. 

Behind the incisors lie the molars and premolars, which are responsible for grinding and crushing fibrous plant material. Guinea pigs typically have 20 teeth in total: 12 molars, 4 premolars, and 4 incisors.

Unlike human teeth, which have a fixed size and stop growing after reaching a certain length, the guinea pig’s teeth grow continuously throughout their lives. 

This type of tooth is known as “open-rooted”. There are many other animals with open-rooted teeth including horses, rabbits, and rodents. This adaptation compensates for the wear and tear caused by their abrasive diet.

Dental Growth Patterns and Mechanisms

Guinea pig teeth growth occurs from the base of the tooth. As new tooth material is produced, it gradually pushes the older, worn-down portions of the teeth outward and upward. This process keeps the teeth at a consistent length and shape, keeping chewing and grinding of food efficient.

The continuous growth of guinea pig teeth is regulated by a process known as dental eruption and attrition. Eruption refers to the continuous growth of new tooth material from the base of the tooth, while attrition refers to the gradual wearing down of the tooth’s surface due to chewing and grinding. 

Together, these processes maintain the teeth at an optimal length and shape for their functional requirements. However, the continuous growth of guinea pig teeth can also present challenges if not properly managed.

Common Dental Issues in Pet Guinea Pigs


Malocclusion in guinea pigs refers to misalignment or improper positioning of the teeth, particularly the incisors. This condition can occur due to genetic factors, trauma to the mouth or jaw, or nutritional deficiencies.

Malocclusion may also develop if the teeth are not wearing down properly, leading to overgrowth.

Some of the common signs of malocclusion include:

  • Difficulty eating or dropping food while chewing
  • Excessive drooling or wetness around the mouth
  • Weight loss or decreased appetite
  • Inability to fully close the mouth
  • Overgrown or crooked incisors

If malocclusion is left untreated, it can lead to pain and discomfort, making it difficult for the guinea pig to eat or groom itself. Overgrown incisors may curl into the mouth or puncture the cheeks, leading to injuries and infections.

Secondary health issues such as weight loss, digestive problems, and oral infections may also occur.

Dental Abscesses

Dental abscesses in guinea pigs are caused by bacterial infections that develop in the roots of the teeth or surrounding tissues. This can occur due to dental trauma, tooth fractures, untreated malocclusion, or foreign objects lodged between the teeth.

Poor dental hygiene and underlying health conditions may also increase the risk of dental abscesses.

Common signs of dental abscesses include: 

  • Swelling or lumps around the jaw or cheeks
  • Pain or tenderness when the affected area is touched
  • Pus or discharge from the abscess
  • Reluctance to eat or chew on the affected side

Overgrown Teeth

Overgrown teeth is one of the most common tooth problems in guinea pigs. Causes include a combination of genetic predisposition, improper diet, and lack of appropriate chewing material. 

Insufficient wear on the teeth can lead to elongation and curvature, making it difficult for the guinea pig to eat properly.

Common signs of overgrown teeth include:

  • Excessive drooling or wet chin
  • Reluctance to eat or difficulty chewing
  • Weight loss or decreased appetite
  • Visible overgrowth or misalignment of the incisors or molars
  • Behavioral changes such as increased aggression or irritability
guinea pig teeth

When is Veterinary Care Needed?

Guinea pig dental problems can have serious implications if left untreated. Knowing when to seek veterinary assistance is critical, as is finding a veterinarian experienced in guinea pig dentistry. 

So when is it time to take your guinea pig to the vet?

If you have tried to address the problem already without success, it’s time to take your pet to the vet. Don’t leave it too long, as your guinea pig will be suffering and probably losing weight in the meantime. 

If you see any visible abnormalities of the teeth or mouth, like tooth overgrowth, misalignment, or signs of infection (swelling, pus), your guinea pigs need immediate vet attention.

Guinea pigs are hearty eaters, so sudden appetite changes or chewing issues should prompt a vet visit.

And of course, if your guinea pig seems in pain with teeth grinding, vocalizing, or pawing at the mouth, seek vet care immediately.

What to Expect at the Vet

The vet will start with a detailed physical exam, focusing on the mouth, teeth, and jaw. This may involve gently checking for signs of overgrowth, misalignment, or other problems.

Due to guinea pigs’ small size and complex dental structures, vets often use advanced tools like X-rays for a closer look. X-rays help identify issues such as tooth roots growing into the jawbone or hidden abscesses.

Sometimes, a vet may need to sedate the guinea pig for a more detailed exam of the back teeth, which can be tricky to assess when the guinea pig is awake and stressed. 

Treatment Options for Guinea Pig Dental Problems

Treatment for guinea pig dental problems varies widely depending on the specific issue at hand.  

Some common approaches include:

  • Trimming or Filing Overgrown Teeth: For overgrown incisors or molars, vets can carefully trim or file the teeth to a healthier length. This procedure often provides immediate relief, but a proper diet and regular check-ups will be needed since the teeth will continue to grow.
  • Correcting Malocclusion: Misaligned teeth can be trimmed or filed so the guinea pig can eat normally. Their diet may need to be adjusted, or more suitable chewing materials provided to prevent recurrence. If malocclusion is caused by genetic problems, it is likely that regular teeth trimming will be required for the duration of the guinea pig’s life.
  • Treating Dental Abscesses: Treatment typically involves draining the abscess under sedation or general anesthesia. Antibiotics will be prescribed to fight the infection. Removal of the affected tooth may be necessary.
  • Dietary Adjustments: Proper diet plays a central role in preventing and managing dental issues. A diet high in fiber, including lots of hay, helps wear down teeth naturally and supports overall dental health.
  • Pain Management: Your vet may prescribe pain medication to ease discomfort  while your guinea pig recovers. 

Make sure to follow your vet’s aftercare instructions closely and monitor your guinea pig for any signs of distress or recurrence of the problem.  

Preventing Teeth Problems in Guinea Pigs

Preventing dental problems in guinea pigs largely hinges on providing them with a suitable diet and environment that mimic their natural habitats and eating behaviors. 

Good grass hay should make up the majority of a guinea pig’s diet, as its rough texture helps in the natural wearing down of their teeth. Timothy hay is always a good choice due to its high fiber content. Make sure that your guinea pig has unlimited access to fresh hay daily.

Alongside hay, include fresh, leafy vegetables in your guinea pig’s diet. These not only provide essential nutrients but also require chewing, which further aids in dental health. As well, make sure your guinea pig’s diet has enough vitamin C either through supplements or vitamin-rich fresh foods.

While pellets can be a part of your guinea pig’s diet, they should be given in moderation as they don’t require as much chewing. Treats should also be offered sparingly to avoid excess weight gain and dental problems.

Chew toys made from safe, natural materials like untreated wood or cardboard can help satisfy your guinea pig’s need to gnaw, which promotes tooth wear and maintains dental health.

Schedule regular check-ups with a vet experienced in exotic animals to monitor your guinea pig’s dental health. Early detection of any issues can prevent more serious problems later.

Do your own weekly health checks by taking a good look at the front of their mouth and feeling the sides of the jaw for any signs of swelling or abscesses. Be observant of any changes in your guinea pig’s eating behavior or weight, as these can be early signs of dental issues. Catching problems early can make a big difference.

By focusing on these preventative measures, you can help ensure your guinea pig maintains good dental health.

Wrapping It Up

With the right diet, preventive measures, and regular check-ups, your guinea pig’s teeth can remain in good condition. But if you suspect any dental issues, it’s always a good idea to consult with a veterinarian experienced in dealing with small animals. 

Taking care of guinea pigs’ teeth may seem daunting, but it’s an essential part of their care. By providing lots of hay, the right diet, and keeping an eye out for signs of dental distress, you’re not just looking after their dental health — you’re ensuring they live a long, happy, and healthy life.

About Our Guest Post Author:

Dr. Wendy Wilkins is an experienced veterinarian and epidemiologist with over 20 years of expertise. She holds a Doctor of Veterinary Medicine (DVM) degree and a Doctorate in Epidemiology from the University of Saskatchewan. Throughout her career, Dr. Wilkins has excelled in clinical practice, academia, research, and regulatory veterinary medicine. She is a respected voice in knowledge dissemination, delivering factual information in a readable and understandable manner through articles, books, and public engagements.

Dr. Georgina Ushi is a veterinarian and freelance medical writer. She received her Doctorate from the University of Florida College of Veterinary Medicine in 2009. She currently works in the Tampa Bay area, providing compassionate care to dogs and cats. Alongside her clinical work, Dr. Ushi consults for pet well-being brands and writes health articles for her blog, Pet Health Love. She is passionate about sharing her knowledge to educate and inspire fellow pet owners. Dr. Ushi’s professional interests include emergency and critical care, wildlife medicine, nutrition, and hospice and palliative care.

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