*Diet:* Guinea pigs are herbivores and primarily eat hay and fresh vegetables. However, if their diet is too high in carbohydrates and low in fiber, such as excessive amounts of pellets or treats, they can gain weight.
*Genetics:* Some breeds of guinea pigs, like Texels and Peruvians, are more prone to obesity than others. These breeds have a genetic tendency to accumulate fat.
*Age:* As guinea pigs age, their metabolism slows down, making it easier for them to gain weight.
*Lack of Exercise:* Guinea pigs need regular exercise to stay healthy and maintain a proper weight. If they don't have enough space to move around, they may become less active and more likely to gain weight.
*Medical Conditions:* Certain medical conditions, such as hypothyroidism and pituitary gland disorders, can lead to weight gain in guinea pigs.
To prevent obesity in guinea pigs, ensure they have a balanced diet, with plenty of hay and fresh vegetables and limit the amount of treats. They also need a spacious cage or enclosure with toys or obstacles to encourage exercise. If you suspect your guinea pig is overweight, consult a veterinarian for advice and recommendations on how to manage their weight.