Welcome and congratulations on your new little one! I think it just takes time for them to figure out how it will all work out. I also think it is important to make sure the little one doesn't annoy Star too much and to give her the ability to perhaps even correct him a bit the way his Yorkie momma would have. I think it sounds like the nomal adjustment period.
Soon neither you nor Star will know how you got along without Preston.
Peggy, Monkey & Maddie
