Hello, Paul and welcome back to Just Answer!My name is XXXXX XXXXX it will be my pleasure to assist you with your question today.Pups can be weaned between 2-3 weeks of age.At three weeks of age, the male pups (boars) should be separated from the female pups (sows) and the mom, to avoid pregnancy. A male guinea pig can become sexually mature as young as 3 weeks of age and a female, as early as 4 weeks of age and you would definitely want to prevent any back to back pregnancies if a sexually mature boar were to be housed with a sow who just gave birth, or after this 3 week time period, when her own male babies are maturing.If the mother sow were to become pregnant again while nursing, no, her milk will not stop, but the nursing and the back to back pregnancies will put a very big strain on her body and is not healthy for her or the next litter.Guinea pigs over 8 months of age should not become pregnant unless they have had previous litters. Breeding of guinea pigs is not recommended, as it can be very dangerous for the sow and her babies, but many times, you could be sold a pair of guinea pigs at a pet store and they have been sexed incorrectly, by accident.The way to know if you have male or female pups is shown here: Sexing Guinea PigsIt's usually difficult to tell the sex until they're about 3 weeks old, but the sooner you know which are male and which are female, the better, as then you can separate them at 3 weeks, to avoid pregnancies.I hope all will be well with Rosie and her babies!
When will/should the pups begin on solids? I ask because Rosie is being a bit skittish on letting them nurse and they are only a week old.
Hi again, Paul.I hope all is going well with Rosie and her babies and she seems less skittish today; I also wanted to add some information to my previous answer, about nursing.If there are more than 2 pups, you will have to see to it that all are getting equal time to nurse. It's also important to weigh them every day to make sure they are gaining weight (keep a chart) and if you find one pup is smaller and/or not gaining weight as the others, encourage it to nurse without the other pups vying for a nipple, so it is not excluded/pushed out and not nursing enough.