A custom dog crate or kennel may be just the thing to keep your dog calm and secure when they are sleeping or you are away from the home. The following can help you design your kennel. Issues With Sizing When it comes to crates and kennels, size is the single most important factor to consider. An overly large crate, for example, takes up more room than necessary. Further, a nervous dog may be prone to pacing and other anxiety-induced behaviors if the kennel is much too large.