
No idea on the guards but daughter had a crate for about 10 yrs, used for a hyperactive (vet diagnosed so not just your average 'lively'!!) it lasted for over 10 years with the Rott doing 'wall of death' in it when DD overtook any red or 'council colour' yellow lorries...strange dog, she hardly bothered if it was blue, green etc.
The crate looked fairly beat up when we lost the Rott but still quite usable.
ps, good strong bolt type catches on it. only drawback was it was quite heavy.