I have a 42 pound standard poodle and she demolished this large crate in 3-1/2 days by pulling on the wires, bending the frame, and finally pulling apart the welds. She also easily figured out how to open the door by bumping the door and pushing up with her shoulder. I came home every day to a nervous distressed dog, who also ended up poking herself with the broken wires.after four days (when the crate was unusable) I got a regular "clamshell" type crate and she is now safely confined, well rested and relaxed at the end of the day.