A protective device 104 for hoofed and shod animals fabricated of a durable and flexible material is presented. The protective device 104 includes a base 106 and a wall 108, with the wall designed to enclose a hoof 100 of a bare or shod animal such as a horse or cow. The protective device 104 includes a means for size adjustment 216 such as a sizing opening 214 in combination with a plurality of tread grooves 304, which assists in the adjustment of the size and shape of the hoof to fit a variety of hoofs. The protective device 104 preferably includes a shear-relief portion 302 formed such that the front of a hoof has minimal contact with the device 104. Ease of installation, decreased impact, and improved traction are all benefits provided by the protective device 104 disclosed.