There are three most common materials used – steel, aluminum, and wood. The steel ones are the most durable and an excellent option for the aggressive dogs. The aluminum kennels are a bit lighter but equally as durable, while the wooden ones look the best but aren’t as safe as the two previous versions. For smaller and not aggressive dogs check top soft-sided crates.
The ventilation, on the other hand, is solved by the addition of a generous number of holes in each side of the crate. Their purpose is to promote extra air flow and allow the owner to use the cage on warm days. The heat can also cause evaporation of toxic materials, but that’s not something you need to worry about with this model – no harmful chemicals were used during its manufacture.
Most Helpful review (read the full Amazon review): “We purchased two of these crates for our 60 lb dogs over 2 months ago. The 42″ size is quite large, in fact, both dogs can sleep comfortably together in one. The crates are like cozy, mini tents and my husband and I joke that we'd like to sleep in them. They are very light to move around, and easy to fold up or down. We've had two problems. One is that…“
It is a little flimsy but it isn’t being moved all over the house so it’s perfect for my girl. She out grew the one I borrowed so I had to buy a new one and it had to be bigger and cheap. The three doors don’t really make sense but whatever. The handle was broken in the box but I didn’t plan on using it and threw it away. It would be a five star if the crate wasn’t so flimsy. It did open and set up quickly.
This is the cutest crate ever. I love the pink color. My dog will even go in here when everyone is home just to chew on her bones or take a nap. A size small perfectly fits a 20 lb Boston/Pug mix. If your dog is an escape artist, however, you might want a different crate because this latch is kind of easy for them to unhinge. My dog has escaped two times, but that was when her separation anxiety was a lot worse, which I think helped catalyze her escape.