There are a few reasons why one guinea pig might be bigger than another.
It could be due to genetics, or it could be because the bigger guinea pig is simply eating more.
If you have two guinea pigs who are the same age and breed, then it’s likely that the difference in size is due to genetics.
Some guinea pigs are just naturally larger than others.
If you have two guinea pigs who are of different ages, the older one is probably bigger because it’s had more time to grow.
And if you have two guinea pigs of different breeds, the larger one is probably a mix of two or more breeds, while the smaller one is purebred.
Whatever the reason for the size difference, it’s important to make sure that both guinea pigs are getting enough to eat.
If one guinea pig is significantly larger than the other, it’s possible that the smaller one isn’t getting enough food.
So, if you have two guinea pigs and one is significantly larger than the other, make sure to keep an eye on their food intake and make sure the smaller one is getting enough to eat.