It's interesting to say the least! We brought Covergirl to her new home and picked Rusty up the same day, so when we came back with the trailer Kassie must have been pretty confused. She was a bit annoyed, and I planned on turning them out together after a few days or a week. Rusty had other plans and jumped over the half wall dividing the stalls to run out and follow Kassie. She was NOT pleased! How long have you had the boys together now? Just wondering how long it may take for things to settle down.Much better now but Kassie doesn't know how to share, she's such a momma's girl.