The wires used for small crates may not be sturdy or rigid enough to retain their structural integrity when used in big crates. Additionally, large dogs have stronger jaws and teeth than smaller dogs do. Accordingly, you’ll always want to look for crates that feature thick, strong wire (if you opt for a wire-style crate – there are certainly plenty of other options out there too!).
Many people will be reading this because they are looking for dog crates for Pitbulls which are indeed extremely powerful pooches. You will need a good gorilla-tough dog crate to keep them under control. Physical strength is only one aspect of a dogs escape ability! Pooches are intelligent animals and will work relentlessly to find a weak spot and exploit it.
It is always wisest to purchase a crate that will last for your dog’s entire life, rather than buying a small one when she’s a puppy and increasingly larger crates as she grows. Instead, go ahead and buy a crate that is suitable for her adult size and use dividers to temporarily shrink the size of the interior. As she grows, you can remove the divider to provide access to the entire crate.
SmithBuilt is one of the most renowned manufacturers of extra strong metal dog crates – they’re well-known for the comfort and security of their models. Those looking for a reasonably priced indestructible dog crate should consider their newest product, the SmithBuilt Heavy, as it offers good construction quality, a convenient 2-door design, and a removable pan for easy cleaning.
Update: We traveled quite a bit this holiday season and this portable crate was absolutely awesome! I have seen some reviews about bad zippers but suspect it's due to misuse. You have to raise each side before zipping it -- just common sense, people. Otherwise, there is too much pressure on the zipper. I think zippers on this crate are sturdy. Another suggestion is placing your dog's favorite bed inside. The crate (we have extra large) has plenty of room to add an extra large fluffy dog bed our dog loves. Because the crate folds flat, we place the crate in the cargo area and cover it with dog's bed when on the road. The dog sprawls like a queen! :) When we get to the destination, we unfold the crate, throw the bed inside, and voila -- cozy house that ... full review