Sabina I think the whole security thing can be a bottomless pit, as there are almost always possibilities to increase security. My parents for example always increased security whenever they found out that I managed to get the cage off. That led from a cage with a padlock, which was rather easy to pick because I could just turn it and have the keyhole facing me to a cage with and integrated lock, which was a lot more difficult to pick due to the angle of the lock. When I was caught trying to pick that lock, they just started pulling wire seals through the lock and that's where my security journey ended. While the seals do not make it impossible to pick the lock, they do make it impossible to remove the cage without my parents noticing it as the seal would prevent even the right key from being inserted into the keyhole and the only way to remove it is do destroy the seal, which is uniquely numbered and thus can't be replaced.
There might be additional measures to increase security, but my parents don't care as they know that more is simply not necessary.