Heat only when. Pet. Therapy. Gel. Pack is at room temperature. Safe. For. Use. In. Hydrocollators. Microwave. Heat at full power at time intervals listed. If. Pet. Therapy. Gel. Pack starts to expand. STOP. Heating. Remove from microwave and knead to distribute heat evenly. If additional heat is desired heat at full power at time intervals listed. Place. Pet. Therapy. Gel. Pack inside. Pet. Therapy. Wrap or towel then apply to injured area. DO. NOT. OVERHEAT. Excessive heating may cause. Pet. Therapy. Gel. Pack to rupture leak and cause bodily harm. Directions for. Cold. Therapy. Use. Place. Pet. Therapy. Gel. Pack in freezer for at least 3 hours. Remove. Pet. Therapy. Gel. Pack from freezer and place inside. Pet. Therapy. Wrap or towel apply to injured area. This product is non-toxic but not meant for animal or human consumption. Contact your veterinarian if your pet consumes the pet therapy gel or outer plastic cover.