What are some ways to reduce stress?

[Neal]

How large is "larger"? Last time I weighed Malfoy, he was 4.4lb. Some days he "fills up" the xl hide, and other days he makes himself smaller and there is space between him and the entrance.

I'm referring to it not being as space efficient as the reptile basic ones because they can't fit in a corner so witht hem being oval they take up more space.