Veterinary Products Laboratories Duralactin Feline Nutritional Aid, 200mg Duralactin Feline is an Immuno-Nutritional aid for the management of chronic inflammatory conditions in cats Microlactin protein helps reduce the symptoms of arthritis and other inflammatory joint conditions without harmful side effects Provides relief for pets who have trouble standing or walking, limping or favoring a leg, or are moving with stiffness or seemingly sore joints