"This is my puppy's 3rd crate, and it's the best one we've had so far! I bought the largest size for my puppy, who is an 8 month old husky/lab mix (definitely over 50 lbs). The construction of the crate is very strong and sturdy, and the 3 doors are a great feature. We feed her in her crate, so the extra doors make it a lot easier to put her food and water at the other end of the crate. Another great feature of the doors is that they open both ways. At least for the 4 ft long crate, the doors can swing in and out, although my puppy hasn't realized this yet and still makes an effort not to push the door."