Not built strongly enough for a 25 pound dog. My rescue dog had never been crate-trained but he is an easy to train cockapoo and in short order he took to the crate. I Thought the same training would apply to a smaller version of a crate -- this rollabout. Nope. He hates it. It's too small for him to settle into. When I force the issue, he bolts. Not even giving him rewards makes the rollabout palatable. The unit is just not big enough. No way could this work for a 30 pounder, as advertised.