"Whelping box plans are fairly standard with most designs based on 4 - 5 ft. walls 12 inches high, railings on the inside of the box to protect the pups from a restless mom and a bottom surface that is absorbent and washable"
The typical whelping box should be constructed out of wood as follows:
Size: 4 to 5 feet on each side
Height: 12 inches If needed make one side a bit shorter to help the mom climb in and out
It is suggested that you use removable sides to facilitate cleaning and storing the box after use. You can do this by creating grooves out of molding for the side panels and then use eye hooks to hold each panel in place.
Make a shelf around the top of the box with wood pieces that are approximately 3 inches to 6 inches. The pups will crawl under these shelves and they will prevent the mother from crushing any of the pups when she moves or rolls over. As an alternative you can use 1/2 inch dowels that will act as rails.
The bottom of the box should have a layer of newspaper followed by a washable material such as a towel. Do not use anything that can be too deep for a pup such as a blanket or wood type chips. You can also buy a commercial whelping box pad.
Supply heat such as a heat lamp that will keep the area 85 degrees with the first week, then bring the temperature down each week until 72 degrees in week 6. Make sure the mom and pups cannot reach the lamp.
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