I really like this crate! As far as the slats on the bottom I placed a heavy duty floor mat the kind in workout facilities and it worked just fine. It seems like there is missing a part to secure the door latch. Overall, I place two large dogs inside, and have had very large breeds inside. I am not sure how dogs are busting out maybe the assembly was flawed I find it to be very sturdy. For dogs with anxiety I would not leave them alone in a crate, in an out of the way place to begin with - sounds like a trainkng issue. Nonetheless there are dogs that can bust out of anything, they are probably best contained in a more industrial strength kennel, like a Ruff Tuff but realize they are not designed for luxury. l guess it’s best to know your dog.