Hi Does my female guinea pig look pregnant she has been looking like she’s getting a lot bigger and more pear shaped around stomach area she has gained 41g in 4 days she was 448g now 489g we got her and her sister 10 days ago from pets at home they are definitely both girls her sister is small her sister weighed 306 g 4 days ago now weighs 324g she has gained 18g under half than her sister pets at home said they were around 11 weeks old