Abstract: A dog boot for the rear leg of a dog having a foot, a tarsus joint and a fibular tarsal. The dog boot is comprised of a sole extending from the foot to the tarsus joint. An upper heel section is fastened to the sole and fixed proximally the tarsus joint shaped so that the boot is anchored on the leg by the fibular tarsal. The upper heel section has an opening for permitting the foot to enter and be withdrawn from the boot. An upper toe section is fastened to the sole which overlaps the upper heel section thereby biasing the opening of the upper heel section to a closed position.