JVP Sanded Perch Covers for Budgies & Canaries. Especially designed fine texture. An essential aid for keeping nails trim and clean. Johnson’s Perch Covers for Budgies & Canaries are suitable for use with finches, canaries, budgies & other similarly sized birds. These perch covers act like sandpaper & slowly wear down the sharp edges from dry skin & claws in a safe way, keeping you & your bird happy.