Abstract: A cover of screen or mesh for preventing domestic animals, such as cats, from entering a crib. The cover can be utilized while a child is in the crib, if the child is not able to pull itself up to a standing position, to prevent an animal from joining the child in the crib and can be utilized when the crib is unoccupied to prevent an animal from entering the crib and spreading fur, dirt or otherwise disturbing the crib. The cover is designed to prevent entry, and does not restrain the child within the crib. The device utilizes interengaging hook-and-loop type securing strips, such as VELCRO, to secure the cover to place on the crib, and is designed to support the weight of the animals to be excluded so that the cover will not collapse into the crib. The cover incorporates an opening for passage of a crib accessory, such as a mobile, which remains in place during entry and exit of the child and during removal or replacement of the cover.