GREAT giant size perfect for confining cat(!) 8 weeks after major ortho surgery.  Humans could sit in crate to give meds, do PT 'on site' & cat didn't get depressed from confinement BUT Metal tray for bottom of crate was Totally Useless -so noisy when cat walked on it cats in other rooms freaked out.  Dogs must Lose IT too!  Substituted plastic tray from smaller crate. Conclusion: Giant size is fabulous but you'll need work around for tray issue for Any pet no matter its size