Ella just died a week ago and I broke down and got Remy a friend. Remy is almost a year. I didn't particularly want a baby, remy can be rough when playing, but the new one is 2 or 3 months old and so far they are getting along great. Remy rumbles at her from time to time I think to say this is my area back up, but they eat together and I even caught them in the piggy house/bed together! I do think this one will challenge Remy and keep her very active.
In the past I've had one pig at a time and now realize how lonely they must have been.