I am sure that Sam and Lucy will do just fine. Do they spend the day or do they just go through basic testing.
At our daycare they ask that you bring them on the days that aren't as busy so they can see how they interact through out the day. When you pick them up they give a report card and it lets you know if they are welcome back or not. If there is aggression you have to show that they have gone through classes or some sort of aggression training or you can't bring them back. I wasn't worried about Kiah but I wasn't as sure with Keegan since I haven't had him that long so I had to call and check on him. He passed with flying colors and the staff said they loved him.