Hello guys, I'm a new owner. I'll try to make this short. So I got a female about 3 months old a month ago and just got an additional female companion for her. She's about 5 months. I introduced them and cleaned the cage properly before returning them to the cage together. They are getting along and sharing food but now all of a sudden my previous piggy is now nipping me a lot when I try to pick her up. She has never done this. What could be causing this? It seems like she's nearly being protective of the new piggy or just doesn't want to be removed from the cage now that there is a new one in her space. Please help