I just moved my two pigs into a 2x4 C&C cage and was very excited. But instantly aggression ensued. My younger pig, Stella, started being horrific and started mounting and teeth chattering at Agnes, my 2 year old piggy, instantly. They almost started fighting before I had to take Agnes out. In there old home, there was absolutely no fighting and they got on pretty well after a brief period of time. Stella has had a few incidents in which she has freaked out and started being horrible, and eventually calmed down after some alone time. Is this fighting common in a new home? And should I just let them sort it out? Or should I give Stella time alone in the home to get acclimated? I will add a picture of their cage for reference.