your letting them run around for 45 minutes, but are you interacting with them
stick a couple of plastic bags on the floor, they go crazy, but get down there with them, handle them, slide them across the floor, tease them, chase them, get them used to fingers etc, a court is no different to a front room floor, space is good, but handling is better, far better to handle them lots and keep in a 4ft hutch, than let them have a massive court, but think that theres no need to handle as they have space
now our daughter has a pet ferret that lives in a very large cage in the front room, its sil