I’m a first time owner of two dwarf rats. I have their cage set up with ropes, hammocks, space pods, pom poms, a wheel, a wood chew, a wood bridge, cardboard boxes and foraging toys and dog rope toys. For their play pen I use a 16 inch pen and put boxes, a dig box, pile of laundry and other things like that. However whenever I put them in the pen all they do is jump out. I then gently toss them back into a bin with paper. They continue to do that and rarely run around. I want to add two more rats to our mischief. I want to be a better rat owner and I’m not sure how to do that. They just go back to sleep after free roam time. Please help me! I want to be the best rat mom!!!!