Millie can be a bully around food and snatch stuff from Charlie and make him timid. So when I have Charlie I feed them at the same time but opposite sides of the kitchen island so Charlie has some peace. I also make sure I stay in the room to instruct Millie not to get close to Charlie when she finishes first. I am strict when giving treats, making her sit and wait and giving Charlie his first or she try's to snatch up anything he drops which makes him nervous. If they have a chew then I let Charlie take his into the living room and shut the door so she can't pester him.