Guinea pigs are social group animals, so it is best to purchase at least two animals. This can be either two sows or two bears. Choose either two young animals that can grow up together, or an adult and a young animal, so there is no fighting to determine the ranking. If you take two bears, try to avoid contact with sows, also through clothing, because the smell of a sow can make two bears fight. A bear and a sow go together, but only if the bear is neutered at the age of about 5 months. It goes without saying that someone who wants to breed with guinea pigs cannot continue with such combinations. A breeder will keep a bear along with a few sows.

You can purchase guinea pigs in different places. The easiest way is a pet shop, where you can immediately take home the desired number of guinea pigs. The disadvantage is that in this way you know nothing about the pedigree of the guinea pigs, both in terms of inbreeding and possible characteristics of the offspring (color, coat ...). If the animals are not separated by gender or the sex has happened wrong, you may take a pregnant sow home with all the extra worries that this entails, especially when this happened at too young an age.

Whoever wants to start breeding breed guinea pigs should visit a private breeder. A good breeder keeps track of the pedigree of his animals, so that you know what the expected breeding qualities of the specific animal are and you will not be confronted with major surprises. If it is the first time that you keep guinea pigs, then a breeder can also give you the practical information you need to get started without problems.

A self-respecting breeder will only sell healthy animals. Yet it is also useful to keep an eye on whether the animals are healthy. A healthy guinea pig is alert and is not drowsy in a corner. The eyes must be clear (not blurry or watery) and the nose dry. The shiny coat must be nice, without bald or flaky spots and no wounds. Furthermore, the animal must have a clean anus (no signs of diarrhea) and the animal must feel well-filled and firm when you grasp it. The animal must be at least four weeks old and weigh at least 250 grams, no less than 300 grams before it can leave the mother. Guinea pigs are nestlings, but this does not alter the fact that they, like any mammal, need a certain amount of breast milk.