HIGH setting is for heating the pad up fast,and it should be used at LOW setting for long periods.The heated bed keeps pet off the cold floor and the pet heating pad keeps pet steady warm at night time.Pet heating pad heated up nicely for the second time.Our tip:Give it more time to show its ability to heat instead of the first time you use it.MET/cMET certified,comply with UL499 safety standards. The large heating cat bed adds an extra metal case on the power cord to prevent damage and leakage accident occurred,and with a chew guard around the end of the cord protected our pets not easily chew it up, offers extra safety for your pet and yourself.our pet heating pad is also really easy to clean Veterinary Recommended extra large Dog Heating PadThe veterinarian suggested that when the indoor temperature is below 23 (73.4),healthy dogs are easy to catch a cold. When the indoor temperature is lower than 20 (68),dogs will feel cold when they sleep.The owner needs to take certain measures to keep warm.The owner should keep the dog warm with electric dog heating pad.Puppies,short haired dogs, small dogs,old dogs,female dogs who have just given birth,sick dogs need more special care.