An animal kennel includes a top unit and a bottom unit and a divider unit. The divider unit includes two spring-biased support pins that are each accommodated in holes defined in the top unit and in the bottom unit when the kennel is in use. The holes are all spaced apart from each other in the direction of the longitudinal axis of the top and bottom units so the divider unit defines differently sized spaces when it is supported in different holes. The divider unit also includes an open mesh body so the animal has a large open space in which to reside even though the actual space is restricted.