I bought this for an 8 week old labrador puppy who had just left his Mother. The comforter is heated in the microwave for 30 seconds and then placed into the puppys bed. He lay beside it and went straight to sleep - no whining or crying. Easy to wash, this well made and brightly coloured comforter for puppies is a great invention and has indeed been a real puppy pal. Good price with fast delivery and efficient customer service from Mr Pets.