Puppies bring warmth in through there bellys the best way to keep them at a comfortable temperature is to have a heated whelping disk.
In a well built insulated whepling box this disk will keep them toasty warm. An additional light may be added to help keep the chill out.
http://www.scottsdog.com/tesheatwheln.html
In a well built insulated whepling box this disk will keep them toasty warm. An additional light may be added to help keep the chill out.
http://www.scottsdog.com/tesheatwheln.html