When are guinea pigs fully grown?

As guinea pigs, small guinea pigs are born with fur, open eyes and firm teeth, but they are still far from fully grown. The growth process is only completed at around twelve months. This little guinea pig baby can continue to grow a little - Shutterstock / VelP

If you want to pass the offspring of your guinea pigs on to dear people, you don't have to wait that long until the little ones are fully grown. Find out how guinea pig cubs develop on their way to adulthood here:

Guinea pigs are sexually mature before they are fully grown

The baby Meerlis are usually nursed for three to four weeks, after which they are considered weaned. At the age of four weeks, female pigs can have babies themselves. Böckchen are only sexually mature at five to seven weeks, but theoretically they are already fertile if they weigh about 250 grams. This can be the case as early as three weeks.

To prevent inbreeding between mixed-sex siblings or between mother and son, the goats should either be neutered early or be placed in a separate male group of pigs. In any case, the piglets still have to stay with their usual group and ideally with their family in order to learn important social behavior.

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When are guinea pig babies ready to hand in?

The little Meerlis should be handed over to new families at the earliest at six weeks, but they will benefit if they are allowed to stay in their familiar surroundings for a little longer. Therefore, a delivery age of eight weeks is better. If they leave their group much earlier, they will be very fearful and shy later or show behavior problems.

Depending on the breed and gender, guinea pigs can grow to be 20 to 35 centimeters long and weigh between 800 to 1,400 grams when they are fully grown. This is the case at the latest at twelve months, but some of the rodents stop growing at eight months.