Jack Russell terriers are painfully cute, endlessly entertaining, and seem to run on pure gasoline. This is a lot of dog in a cute little package. Like most terriers, Russells are highly energetic and prey driven, but Russells seem to pack in more bravado and umph than even the average terrier. Watching your dog run after her ball for hours or spin in circles out of sheer excitement, it may be hard to imagine her settled calmly in a crate. It is true that your dog must be well exercised before she can be expected to spend time calmly in a crate, but even the craziest of Russells can be taught to love their crate time.
Teaching your Jack Russell to love her crate depends on making the crate a desirable place to be and gradually increasing time there so that she does not begin to panic and turn her terrier ferocity on the crate or bedding. Terrier owners should be realistic about their dog's capacity for calm and non-destructive behavior, since Jack Russells were bred to kill foxes and have been used ever since for small animal hunting and rodent control. A happy Jack Russell is usually either running or ripping something, so make sure you provide her with things appropriate to destroy like good sturdy chews, things to "kill" like squeaky toys without stuffing and toys with water bottles or plastic crinkles inside. Always observe your dog with any toy or chew to make sure she will not ingest inappropriate material or swallow without chewing.
If your dog expresses any anxiety about the crate, you will need to start very slowly and gradually so as to desensitize her to the crate. Even if your dog is comfortable in the crate, but you have never kept her closed in before, you will need to build time very gradually so as to avoid creating a negative connection with the crate. It is a good idea to have special toys and chews that are only allowed during crate time, so that your dog will associate the crate with good things she can't get any other time. In general, the larger the crate the better for an active dog like the Jack Russel. The exception is if you are potty training, as a too large crate will allow your dog to establish a potty area and a sleeping area.