I recently purchased a female guinea (I now know the error of my ways ) who I was told was "young" as she was not fully grown. It was after got her home that I learned I needed a second piggy and a larger cage. I went right out and got supplies to make a 4x2 c&c and within a week adopted another senior (5yr) guinea from the humane society. My younger pig WILL NOT leave my older girl alone. Even if the older girl is in her pigloo the younger will seek her out and growl/rumblestrut/nip and generally just push her around constantly. She also does this when they are having free range time. They argue and squawk constantly in the cage. Twice i have seen blood in the cage this week. Today after 3 weeks of trying to get them to work it out I gave up and they are now in offset stacked 2x3 cages. They are super quiet now and seem ok. One is even sleeping out in the open (the younger). I'm just curious now as to whether I should get my senior girl a friend as she initially was super excited about seeing my younger girl when they first met. (According to the humane Society she had lived her entire 5 years in a Rubbermaid tote without ever having seen another pig) Even though the younger is mean to her, my senior will still follow her around when they are outside of their cage. My worry is that if I get another piggy and they don't get along I have no room for a third cage. Just looking for some advice.
Which is why we had the babies in the first place. We thought the male was a female and even another vet (who was not guinea pig-savvy) did not catch that he was female. We were clueless until his testicle sac dropped and by then the damage was done and the other two females we had were pregnant.