Petco is horrible. The one in my area is filthy. The people who work there dont' know anything about animals, and the conditions they live in are disgusting. Everyone makes mistakes, most petstores are very bad, but it's great that you found out and are taking the steps neccessary to make sure your piggy is happy.
Good luck.
o yea, get ur piggy a friend (one of the same sex is better, and try adopting him/her), your pig will really appreciate a friend! :0)