An adjustable kennel provides an enclosure for an animal that is lightweight, expandable and collapsible for storage and travel. The kennel has a semi-rigid frame that can be adjusted for size and an expandable, pliable cover allowing the kennel to be adjusted appropriately for the animal occupying it. When in use, the frame includes slidably expandable support members such that the kennel can accommodate different sized animals or can be adjusted to be used over a long period of time as an animal grows.