Phytonics Spine Comp to relieve complaints of the spine in cats, dogs and horses. Spinal complaints often lead to stiff muscles. Spine Comp is an animal feed supplement to treat and support the heavily exerted muscles, tendons, ligaments and joints of the spine. Complaints can vary wildly, which is why Phytonics Spine Comb can be used for a wide range of cases. If the animal is visibly in pain, it is recommended to consult a vet.