No idea how it happened, but just found one of a bonded pair at the foot of my stairs. The cat must have got into the outside run but I can't see how and I don't know how the cat got past me. But I now have just one guinea pig - I got them as babies six years ago so they were very bonded. I think it will be awful for her to be on her own - is it a good idea to try and get another guinea pig or is there a risk that they will hate each other? I know it can be difficult to introduce rabbits but I am not sure about what happens with guinea pigs. Any advice welcome, I can't bear to think of her being on her own.