An attachment apparatus for use in combination with a known low-level laser therapy device. The apparatus is attachable to the front portion of, and operable with, a low-level laser therapy device for passing coherent light past the fur of an animal patient. The apparatus has a body with a plurality of pins that can be pushed through the fur, and which transmit a low-level laser therapy light to skin of the animal. The pins are composed of material that transmits the required light wavelength to the animal's skin.